(Some of these might be considered spoilers if you aren't up to date on Season 2.)
10. You look at your friend's new baby and note: "She's wrapped up exactly the way Locke swaddled Claire's baby."
9. You check your family Bible for hidden clips of Dr. Marvin Candle.
8. On your lunch hour you drive around looking for the Mr. Cluck franchise in your area.
7. You keep checking iTunes for a Charlie Pace Celebrity Playlist.
6. You ask at the quick stop why they don't stock Apollo candy bars.
5. You think your goldfish may have a Dharma Initiative logo on its tail.
4. You call your friends in the carpool Han and Chewy. (This symptom may lead to a false positive. It may only indicate that you're a nerd and not actually suffering "Lost" withdrawal.)
3. At the office, every 108 minutes you open a DOS prompt and type in 4-8-15-16-23-42, even though it does nothing but annoy your boss.
2. Tops on your Christmas list: An Apple II.
1. "Dude, you've got some Arzt on you."