Spend as little time at home as possible. Travel. Find community. Live in a big city and make a ton of friends and throw lots of parties and bring people together, forming your own community. That's what I did and I feel like my 20s have been fulfilling, and I'm looking forward to what my 30s bring.
2) Travel abroad alone at least once if you haven't already, ideally for a few months. Shorter trips are costly and will interfere with suggestion #1. If you're still living with your parents, this can be a good way to test out living on your own.
3) Do not waste your time. You can be out partying, traveling, working, praying, or studying, but don't be doing nothing waiting for a more opportune time to make something happen.
I'd rather go by future results like Biff Tannen.