Here are two approaches--
Manual: Getting rid of slugs and snails is a daily chore in my garden. Each evening I begin my search. I pick off slugs and dispose of them in a bag; what you do with them is up to you! Slugs and snails hide under planters, rocks, undersides of plants--anywhere that is cool and damp--and then come out in early evening and stay out all night. And, just when you think you couldn't possibly find another slug. . . well, there's one just around the corner (or plant).
Environmentally friendly baits: In addition to the manual control of slugs, there are several fairly new baits on the market that are said to be effective: Sluggo, WorryFree, and EscarGo. These are registered for use in the vegetable garden and can safely be used around edible plants. Local garden personality Ciscoe Morris has talked about the importance of not using most slug baits since they are dangerous to our pets, wildlife, and children if ingested. Ciscoe has recommended these newer baits. He also recommends moistening the new baits in dry weather to attract the slugs.
Year 'round Battle: Finally, don't forget to keep up with your slug control, whether manual or with bait, well into the autumn. Slugs can reproduce like crazy. As Ciscoe stated in Ask Cisco (2007): Adult slugs often die if the winter is cold. That doesn't really matter. . . Slugs are hermaphroditic, which means that each slug is both male and female. . .both can become pregnant and can lay up to a 100 eggs each.) Apply one of the safer slug baits in autumn. . .otherwise, those hundreds of eggs will overwinter and hatch. . ." I hope this is useful, meanwhile happy hunting!:-)