How Not to Ruin Your Computer: 20 Easy Points

"How Not To Screw Up Your Computer Or Laptop"
Gifts and Free Advice.com (July 3, 2008)

"Here's some personal advice on how not to screw up your computer or laptop based on stupid things I’ve done over the years. This article should be of help to people who are brand new on the computer, people without much experience and possibly people with mid-level computer skills, who if nothing else can use this as a refresher. I've also included some other advice and pointers to help you avoid other potential computer pitfalls. I'm sure this is elementary advice to the more experienced computer user...."

Years of experience, working with computers? I'd suggest that your read it anyway. A refresher course doesn't hurt.

These 20 points are mostly common sense - and good advice.