I'm only using 5/3/1 for DL at the moment...i train bench with a Westside-ish template, accessory movements being BB rows, floor press, triceps(dips, pushdowns, what have u...), how i train squat is low box squats, then work on quads...so anythin from front squats to quad leg curls.... DL day accessory work is on hams...
For my squat days I usually do BBB front squats 5x10, or leg presses 5x20, or use a widow maker set ala DC and do one all out "heavy" 20-30 repper. I constantly try to improve on my overall reps and or weight with all of my assistance work.
I then will throw in calves and leg curls or GHR's.
Wait a minute... THERE IS ONE!!! I love how bandwagon 531 has gotten, just the other day there were three threads about it. It seems like everyone and their mom is doing it, its really lame. In conclusion, I'm really excited to start it next week.