It's the thing most IT professionals have a bee in their bonnet about. It makes them twitch in one eye and wake up screaming in the night. Yes, passwords. They are a necessary evil and one which most people try to avoid thinking about. But here's my take on it. Either write them down in one place - and remember to cross out the old ones if you change them - or use a password manager. These pieces of software do all the hard work for you, remembering safe, unique, random passwords for sites so you don't have to. Here are some of the best ones to choose from. And just one more thing - don't use green ink - it only adds insult to injury!