How do you clean your floors?

This will seem like a stupid question. Well, it is a stupid question.

My floors look like crap. I used to take minimal care of them and that worked fine. Basically just a damp mop inbetween housekeeping visits. Then I made the mistake of buying a Swiffer wetjet and something about the chemicals in that thing just messed it all up. Now I'm having a hard time getting them to look good again--the wetjet residue is persistent, and the salt from outside doesn't help.

Anyone have some floor-cleaning product they're happy with? FWIW, I have linoleum and a pergo-style product to care for.