Maybe it's your lucky day. Draw a boundary line with chalk. Ants won't cross a chalk line, so they say. Sage or white pepper also will send ants scurrying back to the nest. Ants don't like peppermint, so grow it near doors, or crush mint leaves and sprinkle them where ants are entering the house.
Coffee is considered a bad habit to ants.
Place coffee grounds around doors and windows, and ants won't enter. The acid in apples allegedly will kill the queen and the colony. Leave bits of apple where ants enter and let them tote it back to the nest. Get rid of ants by leaving cucumber peelings sprinkled with salt near the pesky marauders. Mix equal parts of honey and boric acid powder and place the mixture on pieces of paper in problem areas.