Trap fleas in your home using a wide, shallow pan half-filled with soapy water. Place it on the floor and shine a lamp over the water. Fleas will jump to the heat of the lamp and land in the water. The detergent breaks the surface tension, preventing the flea from bouncing out. The first line of defense against mosquitos is to seal their point of entry.
Mosquitos are most active in the early morning and early evening.
They seek areas of still air because they are hampered by breezes. Close windows and door on the side of your house which is opposite the breeze. Change your pet's water bowl regularly. Buy a small jar of citronella oil at your local hardware store and a roll of small sticky-backed felt circles from any craft or picture framing shop. Add a few drops of oil once a week during mosquito season.