Don’t be the guy who’s in the bar/club every night, be the guy who’s in there occasionally when it’s worth it.
Do something new every month even if it’s only small.
If you’re wondering whether to kiss her, then kiss her.
Some things are the most fun the first time, then never quite as good again, others get more fun the more you do them. Concentrate your energy on the second.
Make a budget and get your finances under control, start saving a bit now.
The reason that you’re not as good at sport as the rest is because most of them are older than you.