My tips for backing up:
If using outlook, backup the .pst file.
If using Outlook express, backup the store folder with all the email files in.
Also remember to export favourites and cookies out of internet explorer and your address book out of outlook express. Cookies are important as it saves you having to remember all your passwords when you revisit forums like this one.
If using dialup, export account settings from within outlook/outlook express. This is because most people forget their dialup usernames and passwords.
I also urge people to store ALL their documents, drivers, files, etc into the 'My Documents' folder as it makes backing up so much easier.
I know so many people that still save files on the root drive.
If using outlook express, then should consider moving the store folder to a folder inside My Documents for easier backing up.
Boo!