Entrepreneur
I want to change the world.
Twitter, Kiva, Groupon, LawPivot
Lack of funds is definitely the most frustrating part of a startup, but it is balanced by working on something you really believe in, which has more value than money.
Not learning from your mistakes and giving up too easily.
1) Learn from your mistakes.
2) Get it in writing.
3) Filter out the negative advice.