January is, for many people, a time to clean up their lives, whether that be clearing their arteries (go broccoli, oatmeal and cardio!) or their houses (when in doubt, donate). It's only fitting then that January is Clean up Your Computer month.
If that's on your list of things to clean, then I suggest you check out Smith Micro's products for keeping your computer in line: CheckIt, Internet Cleanup, Spring Cleaning and of course, StuffIt Deluxe!
If you've got a Mac, then start at our CleanUpYourMac site. It's got great articles on how to keep your Mac humming with or without purchases: it's an excellent resource.