Currently working on my stroke. I'm using "practise pro" pocket reducers and shooting power draw shots along the rail. Really dials in the precision in the power draw. Cue ball at balkline, Object ball at 2. diamond then first diamond, then hanging in the pocket. Trying to get the cueball back to hit my tip perfectly. If you don't "snap" that shot, it's hard to make the cueball come back. I needed to loosen my grip quite a bit and engage the wrist more to get this to work, and it hurts, since my wrist isn't doing so great lately, but it is improving. I'm trying to shoot 100-500 shots like this every day. My draw shots was pathetic after 2 years of not playing. 1 week of this has given great results so far.
Another favourite shot of mine is hanging the cueball in the corner pocket , the object ball midway between the corner and the opposite side, shooting the ball into the side pocket. Need to do a few of these every day too.
One more straight in shot drill I like to do is shooting stun-run-throughs. I like to leave the object ball mid table, the cue ball at balk or even further back and then shoot the shot absolutely as hard as I can control, STRAIGHT in. Main focus is having the cueball follow the object ball straight for a distance I determine and mark out with a chalk. I do not tolerate any "hopping" or weering off. I like to shoot harder and harder.
Really, I find that when these shots start working, I rarely need to work on much else in practise. They help my entire game. I like to use pocket reducers for all shots, just to dial in the location of the center pocket, as I have a tendency to target the outside part of the pocket for some shots and I'm working on fixing that .For snooker I do line up and the t-drill or x-drill, for pool I play the ghost. That's pretty much it. I should work on my kicking game more, though.