Remember to take out the trash!
If you really like saving all of your email, you might seriously consider getting a Gmail account. With today’s emails sometimes weighing in at 5 megabytes and more, email programs (Outlook, Outlook Express, Thunderbird, etc) can get extremely sluggish. Sluggish performance eventually leads to corrupt data which means you lose all your email.
You can take steps to avoid this, however, by following a few simple

Some computer users who work in an office or on a PC with other roomates or kids would like to password protect their email, calendar, contacts, etc in Microsoft Outlook. Until today, I didn’t know how to do that. As you know, when I learn something new, I pass it on to you. Remember, this tip is for OUTLOOK users NOT Outlook Express users:
Wouldn't it be nice if you could sort your email by the date it was received or by the name of the sender?