Recently I've discovered Temptation Blocker via Attack of the Show. I'm embarrased that I need it, no it doesn't block bad sites from your computer, as the name implies but it does block programs such as Internet Explorer, Messenger... Say you have an article or message you need to finish but have the habit of checking your email every ten minutes or your blogroll. You can set Temptation Blocker to block those programs that distract you from getting work done for ten minutes or ten hours. After your time is up, your programs are unblocked. Did I also mention that it's FREE!