My personal top 3 is:

- getting into shape (it's needed, but I'm starting that tomorrow)

- persisting (in everything, 2years ago I was getting in a better shape, but see #1)

- live greener (we already use 1/2 of electricity a normal family uses, but I know we could do better)

That's it. And the best part is I can do all 3 things, it's not something I will never be able to do. Better start working on them!