How to get rid of Snails?

I've tried beer and it works well as long as you have the stomach to empty the traps daily. Egg shells didn't work too well for me...maybe I didn't use enough. I've heard that they will not cross copper and know of a gardener that used to line up pennies around her Hosta's to keep the slugs and snails away. Also grapefruit rind halves upside down in the gardens are a good place for them to hide, but again you have to empty the traps daily. I've also heard that slugs and snails hate hair, sawdust, ashes, and coffee grounds.
Plants that repel snails include Azaleas, basil, beans, corn, chard, fennel, grapes, ginger, holly Parsley, pumpkins, rhubarb, sage and swedish Ivy.
Natural predators of snails are Blackbirds, ducks, frogs and toads, lizards and snakes.
Hope this helps!

One thing I know will eat snails is a vinegaroon - mastigoproctus giganteus:

http://insects.tamu.edu/fieldguide/cimg365.html

http://www.enchantedlearning.com/subjects/arachnids/whipscorpion/Vinegarroon.shtml

These critters are huge, can emit a smelly odor (like vinegar, or rotten mayonnaise) and they catch their prey & suck their innards out. My wife had 2 in her science classroom a few years ago & I dropped a few snails in there & next thing I knew, we had empty snail shells! These bugs are very large and scary-looking. I have not found one up here on the caprock of the South Plains, but 1 county South of us, a friend's family finds them often & they give them to us. I've been considering asking her to bring me some of these to put in my garden. But I doubt they can survive the Winter here, unless they hibernate.

My mother used to dump coffee grounds in the flower beds when I was a kid, but I thought it was to ward of insects generally. I've often toyed with the idea of getting my hose-end sprayer out & spraying coffee or tea on everything. The bitter, acidic taste should surely deter some plant munchers, right? I don't drink coffee or tea myself (never liked coffee & Dr told me to avoid tea due to a kidney stone I had years ago), so I seldom have coffee grounds or tea leaves available. My wife drinks coffee, but only on weekends. Maybe I ought to buy some cheap coffee, brew me a pot & spray it on the yard, then spread the grounds out. Our soil is alkaline, so I wonder if coffee or tea would acidify it?

I've also seen pecan shells bagged commerically for bedding cover, but never used it, because I don't like coming in contact with the shells myself while working in the garden. I have 2 large pecan trees in my yard, so I have plenty of shells. I reckon, I could crush them myself & spread them out.

Copper is too valuable these days, or I'd consider laying copper tubing around my beds.