I could never make a checklist of things to do by a certain age, or before I die. I hate planning for stuff, it ruins the surprise if I know what happens before it does :P Plus I don't want to railroad myself.
When I turn 40, I hope I'll be able to say that many of the good things that have happened in my life have been completely unexpected, and I hope that was true for you too.
I feel unexpected successes, surprises and happy things are better because while you enjoy them, you also get to enjoy how incredibly lucky you are to experience something you didn't even realise existed, or you didn't realise you could experience personally.
When I turn 30 (since that's closer) I think I'll make a list not of things that I "should" have accomplished, but of things I did accomplish, with special mention for those I would never have guessed.

I hope you had a good birthday, at any rate.