I'm going to try copper wire around unglazed pots. We have voracious
slugs, some are over 7" long and hunt a couple hours after dark. Beer
traps didn't work so well, snail/slug bait is much better. Some years
are much worse than others, I think it depends on the past winter
temperatures and duration. I've heard the slugs dislike hair, sharp
sand, gravel or diatomaceous earth. But, I've seen pictures of
slugs/snails crossing a razor or knife without getting cut, I guess
due to slime protection. The west coast has some huge slugs that
invade many gardens. Some pick them off early in the morning.

http://zootal.no-ip.info/stuff/2007/...s/DSCF0082.JPG

That is my daughter - she will sit for an hour watching these things crawl
on her hands....