One of the easiest and least expensive ways to store you bike is with good old-fashioned heavy-duty rubberized hooks made to screw into a stud or rafter. Hang bikes with one hook for vertical storage, and two hooks placed a bike’s width apart for horizontal storage.
Don't have wall space to spare? Try this floor-to-ceiling tension bike rack. It's held in place by the tension of the central rod and can be installed anywhere with a solid ceiling and 7 to 10 feet of ceiling height.