1) don't go on busy days
2) if you do, stock a backpack full-o-beer and use the liftlines as a place to drink and talk. Treat the liftlines like a house party: shotgun races, drinking games etc. especially good if it is a holiday and their are a number of the opposite sex.
don't cut in line, one day you'll run into someone you really shouldn't have fucked over who will have a reaction so out of proportion to your offense that you will never cut again...
i personally call them out, if that doesn't work, ski pole to the back of the legs hard. never take it farther than that, its not worth it, and i kinda like hitting people so both the cutter and myself win!