Do keep your original software disks in a safe place and keeps a record of serial numbers in case you need to reinstall software.

Don't install software that you don't really need (internet freebies can cause system problems).

Do keep your data organized - use directories and folders.

Do backup your important data and files regularly.

Do use a virus checker and keep it up to date.

Do use Zone Alarm if you ever connect to the internet.

Do try to leave your system unit powered on as most failures occur at power-up or when cold.

Do use a surge protector to eliminate power spikes.

Do take care with food and drink around your computer and keyboard - spills can kill computers.