Do you compare? Do you let others force you to make judgments about yourself. Do you tend to consider yourself in relation to other people?
Do you worry about how you are perceived or what type of impact you will make?
Do you ever let uncertainty keep you from taking action?
I wrote a post over on Smartblog on Leadership titled Imperfect Leadership that might help you stop wondering "What if?" Who knows, you might just pull the trigger on something you've been thinking about for a long time. Up for a challenge? Go for it!