There is a lot of maintenance for any bike. Fortunately most of it is pretty easy and if you keep up with it you can keep your ride clean and riding smooth. This is a collection of helpful instructables that any bike owner can use for the upkeep of their bike. Make sure to check out my instructable "How to clean your bike chain and drivetrain" (shameless plug)
Please let me know if there is anything else you would like to see added. Thanks!