Don't throw out eggshells. Crush them up and throw them into your garden. They provide needed calcium to the soil as they decompose and the sharp-edged shells keep snails out of your beds.
Diatomaceous earth, available in pool supply stores, works as well. If the snails try to crawl over either material, the sharp edges slices up their obnoxious bellies.
By Linda L. from Vista, CA
If you grow vegetables in your garden, you need to protect the plants from snails. Snails eat all vegetables, especially greens, such as cabbage, spinach, chard and lettuce. Since they multiply quickly, they can do serious damage.