Tip - How Can I Ditch Cable and Watch My TV Shows and Movies Online?

Dear Lifehacker, I'd love to get rid of cable and stream all my favorite TV shows right from the internet. What do I need to know before I take the plunge?
Tags: Ask Lifehacker, Streaming Television, Television, UltraNewb, Top, TV, Cable, Hulu, Sports, Boxee, Movies, Apple TV, Roku, NetFlix, Gawkertv, Lifehacker