Check this out for categories and snag the one that leaps out.
Topics of Interest
My personal recommendations:
Psychology
Critical Thinking & Phiolosophy
Science & Technology
Health & Fitness (there is a motivation thread in there for those of us who exercise; if you do exercise, share--it helps the rest of us stay on track, or 'all' of us get through injuries and illness, then back on track, et cetera.)
Plus to see what people think is worth mentioning:
What Are You Thinking About?
Books, Movie, Music Reviews which is more than simply "Reviews."
Finally, play some games especially share in, look over past responses to "Random Questions."
You are welcome to come to my Home Page, go see where I've been for Latest Posts and see if anything looks interesting.
Hope any of this is useful.