Please post about your passion, the things you love doing, or what makes you happy. They are expanding the categories every day. You will soon have to search for what you like or what really interests you. So, one strategy would be the top poster or blogger in your category. Use good key words to really focus on your topic. don't forget we are still in Beta... Things are happening in the background. Improvements are being done every day. Things you can see and things you can't.
Please don't get discouraged if you don't get votes. Keep posting, commenting on others, and up voting the things that are really good, in your mind.

You can't make everyone happy... No matter how hard you try.

Good post. Good luck.