Find something that makes you feel like the world makes sense. Personally, if I don't get up, get laid, get down on a dance floor, read a good book, write a poem, listen to a mind-blowing record or have a soul-shaking, satisfying conversation at least once a week, the world doesn't make sense to me and I am unmoored.
As with coding and management and matters of finance and marketing, relationships have a learning curve. You learn the basics of "relationshiptiva" (yes, I made up that word): How to deal with sexual etiquette, mundane everyday things, scheduling, and appropriate meetings with close friends, and some equitable plan for who's supposed to pay for dinner or wash the dishes this time. These are basics. And if you're learning them in your thirties, it's going to be much harder.
I always start my spring cleaning off by clearing out my closet and donating old clothes. When I was only able to fill one large shopping bag this year, I realized why: the closer I get to 30, the better I get at personal style. Here are some tips for making sure you'll still like your purchases next year.