I accidentally ordered a large pizza instead of a small
Did you wanted to order a small pizza to save some money? At least you can binge on some extra pizza, who wouldn't love that!
Yes, I didn't watch what I was doing when making the order
It's an honest mistake and you shouldn't beat yourself up about it. At least the damage is minimal like an extra five bucks? Let it be a lesson to be meticulous in life so you won't make big mistakes going forwards.
I thought you were going to tell me to put a button on my screen so I can see what size of pizza I'm ordering. I'm going to stop being clumsy and use my head more often.
Well, now you've got two great ideas to prevent you from making the same mistake. It wouldn't hurt to exercise both options. Even if you make the same mistake again, know that it's not really that big of a deal.