Just any quotes you have that have made an impact on your life. Cheesy enough as it is, I got mine from one of those motivational posters at my old school:
"You miss 100% of the shots you don't take."
Now, every time I have an opportunity I might be anxious about, I just think of this quote, and bad idea or not I go for it (with normally positive results). How about you guys? Also on a side note, if you have issues asking out girls, just go for it because, as this quote says, you will never be with her if you don't ask.