I am using a default arch ISO that I put onto an USB drive
https://www.archlinux.org/download/
Boot into it and start the installing process

https://wiki.archlinux.org/index.php/Installation_guide
If you are used to a different keyboard layout
loadkeys de-latin1

Format disks for a clean start
This will open a application to set partitions
fdisk /dev/nvme0n1

Delete all partitions
d, enter ... (Repeat, until all partitions are deleted)
Create new partitions
n (new)
p (primary)
If it asks you to remove some kind of old signature, agree
1: boot: Sequence: n, p, enter, + 1GiB (enter)
2: root: Sequence: n, p, enter, + 100GiB (enter)
3: swap: Sequence: n, p, enter, + 16GiB (enter)
3: home: Sequence: n, p, enter, enter (Rest for home)

Format all disks
mkfs.ext4 /dev/nvme0n1p1
mkfs.ext4 /dev/nvme0n1p2
mkfs.ext4 /dev/nvme0n1p4

Setup swap
mkswap /dev/nvme0n1p3
swapon /dev/nvme0n1p3

Mount the file system
mount /dev/nvme0n1p2 /mnt
mkdir /mnt/boot
mkdir /mnt/home
mount /dev/nvme0n1p1 /mnt/boot
mount /dev/nvme0n1p4 /mnt/home

Install arch
pacstrap /mnt base base-devel
genfstab -U /mnt >> /mnt/etc/fstab

arch-chroot /mnt

nano /etc/locale.gen
locale-gen
echo LANG=en_US.UTF-8 > /etc/locale.conf
export LANG=en_US.UTF-8
export KEYMAP=de-latin1
echo "KEYMAP=de-latin1" > /etc/vconsole.conf

Setup hostname
echo robot > /etc/hostname
echo "127.0.0.1 localhost" >> /etc/hosts
echo "::1 localhost" >> /etc/hosts
echo "127.0.1.1 robot.localdomain robot" >> /etc/hosts

Install your bootloader of choice, I use grub, cause Im a scrub and dont know better
Damn, what a rime
pacman -S grub efibootmgr
grub-install --target=i386-pc /dev/nvme0n1
grub-mkconfig -o /boot/grub/grub.cfg

Setup root password
passwd

Check if no updates where pushed during install
pacman -Syu

Create sudo account
pacman -S sudo
useradd -m -g wheel shino
passwd shino
mkdir /home/shino
chown -R shino:root /home/shino
chmod -R 777 /home/shino
nano /etc/sudoers
Add shino

Disable root login
passwd -l root

Find your network device, for me its enp4s0
ip link

Configure your network
echo "[Match]" > /etc/systemd/network/enp4s0.network
echo "name=de*" >> /etc/systemd/network/enp4s0.network
echo "[Network]" >> /etc/systemd/network/enp4s0.network
echo "DHCP=yes" >> /etc/systemd/network/enp4s0.network

Enable it
systemctl enable systemd-networkd

Setup nameserver
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
echo "nameserver 8.8.4.4" >> /etc/resolv.conf

From here on, we set up the system
su shino

Stuff we need for all kinds of things later
sudo pacman -S pango kbd wget clang pv cmake git ntfs-3g fuse udisks2 htop ninja python gtk2 gconf libnotify libxss unzip dos2unix bc python2 openssh rustup linux-headers openssl-1.0 npm yarn nodejs-lts-dubnium wxgtk3 python-pip pacman-contrib

Pretty font for our console and polybar
sudo pacman -S ttf-font-awesome ttf-inconsolata ttf-dejavu noto-fonts noto-fonts-cjk noto-fonts-emoji noto-fonts-extra

Display server
sudo pacman -S xorg-server i3-wm i3lock xorg-xinit xorg-xrandr thunar perl-anyevent

Audio
sudo pacman -S alsa-utils pulseaudio pavucontrol

Graphics
sudo pacman -S nvidia-dkms cuda cudnn lib32-nvidia-utils lib32-opencl-nvidia

Basic applications
sudo pacman -S firefox alacritty notepadqq code thunderbird vagrant virtualbox

Stuff that I needed, maybe you will need it too
sudo pacman -S teamspeak3 telegram-desktop nginx mariadb unixodbc mono

sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
sudo systemctl enable mysqld
sudo systemctl enable nginx

Create filesystem for usb slots
sudo mkdir /media/
sudo mdkir /media/usb1
sudo mdkir /media/usb2

Insert a usb with the config files and copy them to the apropriate place
Mounting an USB for dummies (Like me)
Find the usb
sudo fdisk -l
Mount it, assuming yours is on /dev/sdg1, will likely be somewhere else tho
sudo mount /dev/sga1 /mount/usb1

cp -R /media/usb1/.config ~/
cp /media/usb1/.bashrc ~/

echo "exec i3" >> ~/.xinitrc

Set up your git config
git config --global user.email "MAIL"
git config --global user.name "NAME"

Discord is by default enabled in the i3/config as startup
If you dont install it, remove the line then
Setting up Discord
cd ~/
git clone "https://aur.archlinux.org/libc++.git"
cd libc++
makepkg

It will complain that a key isnt trusted, thats how you resolved this issue
gpg --recv-keys
gpg --edit-key

A application opens: Type follwing Sequence (with enter in between)
trust, 4, quit
makepkg
sudo pacman -U <PATH/TO/ABI/PKG>
sudo pacman -U <PATH/TO/NON-ABI/PKG>
cd ../
rm -Rf libc++

git clone "https://aur.archlinux.org/discord.git"
cd discord
makepkg
sudo pacman -U <PATH/TOPKG>
cd ../
rm -Rf discord
Discord setup end

Setting up directories we need
cd ~/
mkdir Games
Copy over your games: pv "path1" > ~/Games
mkdir Repos
Clone your directories
mkdir Screenshots

Setup wine, if u want to use windows applications
Uncomment MultiLib and the line below it
sudo nano /etc/pacman.conf
sudo pacman -Syu

sudo pacman -S wine wine-mono lib32-libpulse

Installing polybar
cd ~/
git clone "https://aur.archlinux.org/polybar.git"
cd polybar
makepkg
sudo pacman -U <PATH/TO/PKG>
cd ../ dmenu rm -Rf polybar

We are done!
Type repeatedly exit until you are at the start again and then reboot
systemctl reboot

Once your system booted again, login and start the displayserver with i3
startx

Enable your internet
sudo dhcpcd

Lets squeeze out the very last % performance and bloat out of our hardware
We build a customized kernel for our system
Using this guide: https://wiki.archlinux.org/index.php/Kernel/Traditional_compilation
cd ~/

Create a build directory
mkdir kernelbuild
cd kernelbuild

Replace numbers with the current version
wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.18.7.tar.xz
unxz linux-4.18.7.tar.xz
tar -xf linux-4.18.7.tar
rm -f linux-4.18.7.tar

Clean up first
make clean && make mrproper

You have two options here:
This will give you the bloated default arch linux config for general purpose
zcat /proc/config.gz > .config
This will tailor it to the current installed drivers and CONNECTED hardware
make localmodconfig

You can do it in the command line, but I prefer a GUI here, also tells you some fun facts for each setting
Configure it to your needs, be careful not to mess something up here
Chances are high that your kernel wont even boot if you remove something important
make xconfig

**With -jk where k is the number of virtual cores +1
Optional: cc=clang, This might fail though with errors
My Setup has hyperthreaded 8 cores
make -j17

From here on you need root privileges
Add modules
sudo make modules_install

Copy your kernel into your boot directory
sudo cp arch/x86_64/boot/bzImage /boot/vmlinuz-custom

Create a preset for your kernel
Open the copied file and rename the endings, i.e. linux => linux-custom
sudo cp /etc/mkinitcpio.d/linux.preset /etc/mkinitcpio.d/linux-custom.preset

Generate img files
sudo mkinitcpio -p linux-custom

Copy the map over to boot
sudo cp System.map /boot/System.map-custom
sudo ln -sf /boot/System.map-custom /boot/System.map

Now, if you have choosen a different bootloader up there, you might take a look at the arch wiki
https://wiki.archlinux.org/index.php/Kernel/Traditional_compilation#Bootloader_configuration
Thats how you do it with grub
This will print your disk UIDS
Take the one for /mnt/boot (/dev/sda1)
sudo blkid

Replace the UUID from above here
menuentry "Arch Custom" {
set root=UUID=XXXX-YYYY
linux /vmlinuz-custom root=UUID=XXXX-YYYY ro quiet splash
initrd /initrd-custom.img
}
Edit grub.cfg at the custom part (Says 40-custom or so)
sudo nano /boot/grub/grub.cfg

When the entry is added, we just generate a new one
Dont worry if your kernel doesnt boot, you can go back to the default one as fallback
Given you have not overwritten it xD
sudo grub-mkconfig -o /boot/grub/grub.cfg