Here is Roy Jones shadow boxing , jumping rope and doing some double end bag work . to give you an idea of what to do
[youtube=425,350]JbRykf-5Zo8[/youtube]

I recommend keeping true to good form , keep your hands up tight and remember defense, don't be as showy as Jones. keep your left hand up, I don't like Roy's form here. the thing is if you practice with the left low, when you in the ring your left will be low. always stay true to proper form on any drill you do. when you get rocked you will revert to what you know, what you have trained to do.