Seal up food, check for holes in corners, behind built in fixtures (cabinets), and put up pet food (if you leave it out). Also general tidiness will help (no clutter, food, clothing, paper around house.
Second the traps…you can also place moth balls in areas where you find evidence of their presence (read: anywhere you find their little poops), and first wipe down with ammonia/pinesol cleaners to disinfect (wear protective clothing-their pestilence is unhealthful to handle with bare hands).