...you've attached a cup-holder to the side of your monitor, right next to the water purifier.

...you get up in the middle of the night to go to the bathroom and check your e-mail on the way back.

...you know your friends' e-mail addresses, not their real addresses.

...someone tells a funny joke, and, instead of laughing, you yell, "L-O-L! L-O-L!"

...you refer to regular mail as "snail mail."

...your e-mail program plays a custom-made WAV (Windows) or AIFF (Mac) file of your voice that says "You've Got Mail!" when a new e-mail message arrives.

...you have an America Online trial CD hanging from your rear view mirror.