Keep WordPress updated! New features come out and you want them. Bug fixes come out and you want them. Security fixes come out and you really want them.
WordPress offers automatic updates, or your host my do it for you. Find out how it works with your specific host and do it whenever there is an update!
Updating Your Plugins
Keep an eye out in your WordPress Administration Panel for updates to WPFolio as well as on this site. And install the updates!
Look, there’s plenty of information on how to back up WordPress on the Codex and plenty of horror stories – I’m just saying do it, do it regularly, and automate the process. You worked hard setting this up. Keep a backup just in case. Plugins are available to help and your host (Dreamhost is great for this) may keep regular backups as well – but don’t depend on them. Make sure you keep your own backups.