I love fruit flies. Naw, just kidding. Hate them suckers too. Had them real bad last year. here are som helpful hints:
1) fruit fly traps. Google them. Fairly effective.
2) pour HOT water down ALL drains in the house. Rumour has it them flies like to hang out in the drains where the water is.
3) Get rid of all fruit that may have holes or seeping juice. They are called fruit flies for a reason!
4) Houseplants. Flies like to hang out in the moist dirt. Not sure what to do here, maybe some insecticide or something.