Here's one good maintenance habit that requires no advanced cycling knowledge – always store your bicycle indoors. It's the easiest way to keep your bicycle working and looking like new.
Exposure to the elements is one of the worst thing you can do to a bike. So, if you can't park it in a garage or shed and it doesn't fir in any closet, try hanging it over a stairwell, or using a free-standing rack to set it to the side.
*If you really love your bicycle and appreciate its aesthetics, try purchasing some hooks and hanging it on a wall.