Any ideas how I can stop grinding my teeth at night?!

Any ideas how I can stop grinding my teeth at night?

My jaw is really starting to hurt and so are my teeth..any good ideas? Also - does anyone know how much a custom made mouth guard at the dentist could cost?

You can mouthguards that are used in hockey at a sports shop. Typically those can be custom made. You place the guard in boiling water to soften it up a bit then you chomp on it (the material cools enough so you don't burn yourself). Of course, follow the directions on the package. But you can probably save yourself hundreds of dollars by getting one from the sports store.