For a different flavor and aroma on grilled meats, sprinkle the hot coals with soaked and drained dried herbs, fresh herbs, or garlic cloves.

Basil plants will repel mosquitoes and flies. Just keep a plant of two around the house.
When using fresh herbs instead of dried, use three to four times more to get the same flavor.

To keep ants away, place whole cloves or sage around the windows and doors or anywhere else they appear.

To keep spiders and other bugs out of the basement, put green hedge apples in the corners of your basement. (These sometimes mold, so keep your eyes open.)

What helpful hints do you know that you can share?