After almost every ride, unless it's 20 miles or less and not sloppy, I very lightly on a low nozzle and water flow setting hose my bike off. Wipe dry and apply lube. Some would say this is a no-no, but I have done this for years on all my bikes and they are all going strong (even the LBS guys comment on what great condition they are in). Sometimes I get ambitious and degrease the chain and cassettes, but not often. I take them to the LBS 1x in the offseason for a thorough cleaning and tuning.