Flow drills are an excellent tool. With IBJJF NY Open right around the corner, we were drilling flowing transitions from takedown/pulling guard to guard pass to submission.
It is an excellent drill to o through steps of familiar techniques and connecting various steps of the progression.
It was interesting to observe the comfort levels of different belt ranks with connecting moves. While white/blue belts have to think through their moves, purple and up obviously have their favorite moves/positions and apply them with apparent ease and familiarity.