Perform Regular Computer Maintenance

Performing computer maintenance on a specific date each month is one way to make sure you do it. Granted, you can setup a scheduler in Windows to do the same. The important thing is that you make sure it gets done. Some of the basic and advanced computer maintenance you should do is as follows:
Basic Computer Maintenance

Run Defragmenter monthly - Go to START>ALL PROGRAMS>ACCESSORIES>SYSTEM TOOLS>DEFRAGMENTER. This will organize your hard drive to make access time quicker.

Run Disk Cleanup - from the same System Tools area, run disk cleanup to remove temp files and clear the Recycle bin.
Advanced Computer Maintenance

Backup your hard drive - Whether you backup your entire disk or just your My Documents folder, take a minute to burn this data to CD or put it on an external hard drive.

Run a registry cleaner-A program like ccleaner will help cleanup lost tid-bits in the registry.

Run a virus and anti-spyware scan - If your system isn't setup to do a scan automatically, make sure you get updated virus definitions and scan you computer for malware.