I like doing my pressing on cables because the tension is constant and the pump and the end is way better than with dumb bells.
I do them as a sub for DB presses when I don't have a training partner I trust to spot me. Plus they're a hell of a lot easier on the shoulders.
They're also good for when you max out the dbs ..my gym stops at 150 dbs and the stack on cables goes to 200
Train them the same as you would db or barbell...with the bonus of a ridiculous pump thrown in
Also try the decline and flat pressing..
You'll need to set up the flat press as you would a military press and drag the bench out a bit and press straight forward
You can hit incline and decline sitting straight up by either pressing up or down..respectively