I used bezier curves to change the shape of an object. By changing the direction and rotation of the curve the object's shape was also changed. I used this to create a wine glass. I found this confusing at first because I was using the wrong kind of object. Once I figured out what I was doing wrong I found it a lot easier.
I also used bezier curves with the array modifier to create a chain out of a single ring. The array modifier was used to create the additional rings and the curve was used to shape the path the rings took to create the chain.