How do you get shiny hardwood floors?

The best way to get shiny hardwood floors is to sand and refinish them and use a glossy (or semi gloss finish). Not only will your floors look glossy, but they will stay glossy looking even after you clean them. (If you floors are in good condition and don't have any scratches, an alternative is to screen & recoat where you just add another coat of polyurethane and you choose a glossy (or semi gloss finish).

Please note that some of the products out there that you can rub on and claim to give you a glossy finish will only give your floors a temporary sheen and that they use waxes and oils that will actually damage the finish/polyurethane on the floor and cause to refinish your floors sooner.