Here are my most recent w/u's. I try to keep my warm ups easy enough to not tire me out, never go all out on a warm up like I see so many people at the gym going to near failure on every set up to their max. The warm up should be stimulating your CNS for the heavy load that will be your working set(s).
275x1, 280x1 1-5 sets of singles until bar speed gets too slow, but not to failure.
work (5/3/1 week 3):
355x5, 405x3, 455x4
work(5/3/1 week 2):