Have you updated your software yet? 0
With the beginning of the new school year, there's no shortage of things to do. As the to-do list gets longer, it's easy to let software maintenance slip to the bottom of the list.
If you or your students use any software that's not web-delivered (basically, any software that is installed and lives on your hard drive), then you should make sure any available updates are pushed through to avoid unnecessary tech problems.