Try to take as much as carry-on as possible, especially the heavy stuff. They probably won't weigh the carry on. And bring a laptop case as personal item, they can hold quite a bit of stuff. This will give you more weight to put into the checked baggage. And wear as much as you can. (I know somebody who boarded a transatlantic flight wearing ski boots!)
------------------
LH FTL, HH Gold, SPG Gold