I take warming up very seriously on lower body days. I used to jog a little, but found it didn't help much. I do plenty of mobility stuff and bodyweight lunges to loosen up my hips, which have been giving me issues lately. I don't spend a lot of time on it, but I still take it seriously.
As for upper body stuff its more just some arm circles to get the blood flowing.
Current PRs at 242, raw w/ wraps- 525, 355, 605, 1485
Roboro tui, perimo vester adversarius
(Build yourself, destroy your enemy)