If you’re bored and want something new to play today, but it’s not dark out yet so you can’t load up Left 4 Dead, consider checking out some excellent independently developed games (free and otherwise). Although World of Goo made headlines due to its high piracy rate, it’s only one of hundreds of great indie games that get released every year. TIGSource’s database of games is fantastic, providing screenshots, download links, and powerful sorting tools: here are free Windows games from 2008, for instance.
Two other great resources: Shoot the Core for shoot-em-ups of every stripe, and Abandonia for abandonware (Classic DOS Games is great too). Now stop wasting your saturday reading blogs and get your Lemmings on!
Update: If you like Lovecraft, check this one out.