Full Body W/O Warmup

I am just getting into full body work outs and I am wondering what is the best way to warm up? If I am working only two body parts it is straight forward, but when everything is involved I am unsure. Would I try and warm up everything at the start or would I warm up each part as I move through out the workout?

Any advice would be appreciated.

I would say both. Really light clean and presses are a great full body warmup. Then do appropriate warmups for each exercise.