I'm pretty proud of myself today.
Why are you feeling proud of yourself?
I can be proud of myself for being kind to others.
You should be proud of yourself for being a nice person. Just don't brag about it all the time or people will be turned off.
Bragging is an art. I'm being an artist atm.
Like I said, as long as you don't go overboard about it then bragging is fine in moderation.