What is the best product to cleaning and maintenance of hardwood flooring?

Smooth floors will need cleaning less often than embossed flooring. Scuffed or scratched surfaces can harbor dirt in the scratches. So there is an incentive to keep the floor smooth. Dirt will polish off with foot traffic. The dust will need to be picked up. If something sticky gets spilled on the floor it will need to be dissolved and wiped up. A hardwood and laminate cleaner will help water dissolve the dirt without leaving a residue that may attract dust or grit. Keeping areas near the wood floor clean will reduce wear. Sweeping sidewalks and garage floors to prevent grit from entering will prevent scratching and is a great upper body workout!
Adding a layer of polish is not as good, in the long run, as adding another coat of floor finish when the floor starts to show wear.