Not every insect in your garden is bent on destruction. Some of them will be perfectly respectful of your garden, and you should be happy to see them. Earthworms will keep soil aerated and full of nutrients. Once you witness a ladybug's appetite for dastardly aphids—and the real damage those tiny aphids can do—you will always be grateful.
If you are growing a fruiting plant, such as garden tomatoes, bees will help with pollination. You can actually attract bees to your plant by planting brightly colored flowers like marigolds.
The one thing you do not want to do is upset your garden's ecosystem with chemical insecticides. These harsh treatments could upset the delicate balance between helpful and harmful bugs—leaving you with only bad bugs and no good guys to defend your garden.
10 things every gardener should know
What kind of gardener are you? Take the quiz and find out
Organic gardening essentials
How to grow your own herbs