low box squat. work up to a 1RM, then take 20% off the bar and do an AMRAP set.
arch back good mornings. work up to a 3RM, then take 20% off the bar and do an AMRAP set.
jerk recoveries. 5 recoveries heavier than your best jerk.
jerk steps from back squat position. 3 sets of 10 steps each leg. use your best jerk weight.