I've personally stopped using Outlook or any other standard client entirely, and have gone entirely web-based with three different accounts. I used Outlook before when I was working, but it's overkill for my life as a student.
The one exception is that I've set up my iPod Touch to talk to Gmail, and found it works extremely well, so I have Gmail "POP-ping out" to the other two accounts hourly, and all mail eventually arrives in the one place. I can still log on directly if I know something's arriving that needs urgent attention.