I'll be 40 in a few months, and I think I'm looking forward to it. While ages are arbitrary, it feels symbolically like a new era. Among many blessings, I think one thing I appreciate about my life now versus twenty years ago is my ability to focus and prioritize. I spent a great deal of my youth bouncing around from project to project (I always had dozens at any one time) and focusing on nothing.
Now, I know what I want. I prioritize what's most important, and I go after it, systematically and consistently. It's wonderful. Not only do I get stuff done now with regularity, but it's the stuff that I'm passionate about.
I'm in the middle of work on my third novel, and I feel that the focus and attention I'm putting into it is paying off like never before. And like we've all heard a million times, the more you do something the better you get at it.