Backup your computer's data files NOW!
We have all been told a million times about the importance of backing up your important computer files. Many of us even have automated processes to accomplish this. The thing is that computer configurations, online services and even local settings can change resulting in no backups.
Take the time to check your backup scheme and verify that is is working. If you don't have a backup scheme, get one.
At home and work I use a scheduler program called Handy Backup that copies files from one place to another such as another computer on the network, or network attached storage or even a jump drive. Jump drives are very cheap now so nobody should be without a means to backup files.
Image Credit » http://commons.wikimedia.org/wiki/File:Adult_Male_Phidippus_mystaceus_Jumping_Spider.jpg