Some tips I got when I was trying to continue an action between two shots. ( in my case turning)
It is OK to cheat.
Try and have similar silhouettes between the last and the first poses.
It is very important to follow the same arc of motion as the previous shot. Like say if an arm is awooping down in the previous shot have it swoop up continuing the arc on the next shot. ( this is where you’ll have to cheat.)
No need to be exact, have some purposeful mistakes. If it is too exact it might look like a pop.
On a side note: Unless a shot absolutly demands it, DO NOT have the character start and stop at the head and tail of shot. It looks very odd if all shots in a sequence are like that. And there is a tendency to do that in CG. Animate through the cut, it feels much better.