Something that most of us bloggers probably never think about is our passwords. We set them up in WordPress, out FTP, and e-mail, and leave them the same forever.
Over on Daily Blog Tips, there is a post recommending we switch it up from time to time like many corporations force people to do.
In order to avoid problems you should change your important passwords (e.g., WordPress, web server, FTP and so on) at least a couple of times every year.
Maybe this would be a good plugin for someone to develop for WordPress? Something that makes passwords expire every four months or so. Great post from Daily Blog Tips.