Buy a good computer to start with.
Expose the computer to as little heat and dust as possible.
Keep your operating system software up to date.
Have a good antivirus program and keep it up to date.
I recommend Norton Antivirus.
Rid your computer of spyware.
I use three spyware detection programs and keep them up to date.
Spybot search and destroy is one to have.
Don’t clutter your computer with a lot of unnecessary programs.
Have priorities some for fun and some for work.
Dump your temporary internet files at least once a week.
If you use system restore, I recommend using disk clean up
To clean old restore points that are no longer needed.
If your computer is running good and you haven’t installed
Any new software for a while, this is the time to clean all but the last restore point.
Here is the key.
Defragment your hard drive or drives,
Every two weeks. This will give very noticeable results
When used in conjunction with the above.
You could shut down unnecessary visual effects,
For some added speed.
If you like effects, just use efficient ones.
Don’t overload your internet browser
With a lot of after market tool bars or add-ons.
512 MB ram minimum.
Take this advice at your own risk.