If you use Sluggo, or a similar Iron Phosphate slug product (Southern States sells it as Slug Magic), remember that the slugs that eat it will live for another week or so. Slugs are particularly troublesome in soil with nearby debris, rocks, bricks, flagstones, large sticks, etc., where they shelter during the heat of the day. Removal of the debris helps a lot.
My most troublesome spot is a long bed alongside the brick foundation of my house. For this bed, I lightly sprinkle Slug Magic on the soil surface two weeks prior to setting out the plants. The slugs seems to just slither over diatomaceous earth, though I'm sure it's accompanied by tiny slug screams.
I've found that diatomaceous earth (DM) is effective if there is a significant problem with earwigs, which will gather at the growth tip and chew it up. The razor sharp edges of DM scratch the waxy coating from the exoskeleton of insects, and causes them to die of dehydration over a period of about a week. DM seems to lose its effectiveness after a hard rain, so I try to time its application to coincide with the start of several days of sunny conditions.
Bob