I've recently changed the strings on my guitar and i cant get it in tune properly and the action is all messed up how do i fix this?
Best off getting it set up at your nearest music store!
If you have a strat-style bridge, you can adjust the action by turning the small screws on the settle. If you have a tune-o-matic bridge, you can turn the thumbwheels. This is easier than going to a store, because it will save you time, and probably money.