I have Windows Mail (in Vista) and it gives you as many folders as you want and they come in different colors. So that is one way I organize my e-mail. Others ways are setting up different e-mail accounts (like gmail,hotmail,yahoo) and using each account for whatever you want. Whether its for clients, certain types of emails designated to each account, etc.....I also use gmail both on my desktop and laptop so I can access what I need when I am using my laptop remotely.

Jo-Carole