I started posting in Politics. It made me learn.
What are you interested in? Do you like art, philosophy, history, math, science? Or do you like Entertainment Tonight? Go into a book store and look for something that you might be intersted in. If you like history and politics, like me, you might want to pick up "The History Of The Decline And Fall Of The Roman Empire" by Edward Gibbon (I've read the whole series like 12 times through). If you're into literature, you might want to pick up "The Complete Works of William Shakepeare". Let us know what makes you think. Broaden your perspective with the perspectives of others. Always look for proof and facts. Think for yourself. Seek to help yourself and others gain and improve knowledge.