I’m actually using e.ggtimer.com to set an alarm so don’t miss watching the finale of Mad Men in real-time tonight (and not on DVR 4 days later – how novel!)
The website is GENIUS. You just go to the URL e.ggtimer.com/ and after the backslash, just type how much time you need. For example:
When time’s up there’s a loud beeping and the screen flashes (and jumps to the front of your screens even if you’re using a million tabs at once like I do). This is great for timing your cooking while you get lost on Facebook, great for timing laundry so a creepy apt neighbor doesn’t get a chance to go through your underwear and just great in general for curbing your time-sucking computer adventures.