Originally Posted by
stedalus
If you're anal enough to clean and lube after every ride then you'll want to check for water in your frame (pull the seatpost out and hang it upside down). Also make sure the water didn't drive all the grease out of your hubs and headset.
This.
Be sure to clean out the seat tube and lube the seat post to make sure there's no grit or sand in there. If the tube has a sleeve, pull it out before cleaning. You'll save yourself hours of head scratching wondering where the creaking is coming from. If you're real anal, remove the tires and tubes and make sure there's no water in the rim.