As Fuzzyapple recommended, working up to a working weight is always good, although I'd do a little less volume, (e.g., 45x8, 135x6, 185x5, 225x5, 275x5, 315x5)--to each his own, though. Vertical jumps, broad jumps, leg swings, power snatch, etc. would all be good choices. Anything to fire up the nervous system and loosen the muscles and joints will be helpful. I personally like to do a lot of ankle mobility work before I pull. I also like doing quick sets of two or three unweighted vertical jumps between deadlift warmup sets. Try a bunch of things out.