I did find out what mine is. I feel the need to completely finish one project before I start the next one. It might not seem so bad for some people, but for me it is very limiting because I should learn to leverage the help of others to get many things going at once.
Now that' I've shared that with others maybe I can bust through it.
If anyone would like to jump in and share what they think is their biggest contraint I think it would benefit everyone and possibly people can jump in with suggestions on how to bust through it.