Snail & Slug Control: Sluggo
This is the best. Once a week we sprinkle this stuff around the outer edges of our gardens and raised beds and we experience very little slug damage and see very few slugs.
Occasionally one will sneak in on a new plant, so I have learned to inspect carefully prior to planting. If I am not going to plant right away, I will put the flat of new plants — cause who buys just one? — on the ground and sprinkle Sluggo all around. The Sluggo lures them out of hiding and that is the end of that.