What is and isn't appropriate for recycling?

My husband and I have decided to get three receptacles for the kitchen and start recycling. I was wondering what we should and shouldn't put in them? If I were to empty a bottle of Hershey's syrup should I wash it before I put it in the plastic bin? I'm embarred to admit that I don't know any more than I do about the subject, but we're trying to make some positive changes in our lifestyle and this is one of them. Any advice is very much appreciated!