I'm 34, and just in the last year reached the point where I have:
- enough experience and context to do great work, and
- the right people to leverage that context and experience on meaningful applications
It took a lot of waiting for that ideal blend of circumstances to come around. I wish I'd have been able to tell my 26 year old self that as he slogged through an entry level EE job. The choices he made affected where I am now, but he definitely made some sacrifices on my behalf.