One of the things I always feel when I read something like this is that I am running out of time. I'm 29, so this is a comparison that's easy to make. And because I feel like maybe you guys will have the same reaction I wanted to show you this:

http://www.businessinsider.com/people-who-became-successful-...

There may be a better version of this article out there, but the essence is that it's not too late to start to be great at something. So don't let the stress of a successful 30 year old get you wound up.