The biggest problem people have in their on-line experience, including business users is losing their e-mail address because they changed internet providers or their provider went out of business etc.
You can still continue to use your Hotmail, Yahoo or any other e-mail account from your ISP but use it in a smart way!
Step 1: Select a domain name such as your-name.com. Registering a domain name is cheap on average $15US/year and there are no other fees.
Step 2: Find a domain registrar that provides free e-mail forwarding/aliases.
Step 3: Register that domain and create an alias. eg. coolname@your-name.com and forward it to your current e-mail eg. name@yahoo.com
Step 4: You should be able to modify the FROM and REPLY To fields to "coolname@your-name.com" make sure people always e-mail that address and no matter what provider you are on, that address will always exist for life (as long as you continue to register the domain name).
Now you'll never run the risk of losing e-mail again. Just make sure you never e-mail with a reply-to or from address of your old e-mail address and you will be set for life.