I've been focusing exclusively on roundhouse kicks because mine were embarrassing. Such a basic thing and my technique wasn't perfect.

My problem was that I was dropping the knee in the chamber (out of laziness). You're supposed to hold the knee high, using the adbuctor. This is the right chamber, look at how high the knee is (and think about the effort required to keep it up there):

Several times a day, I was going en barre and getting the feel for the right way and wrong way. Telling myself "get your knee closer to your chin" was a breakthrough.

I'd hold it the wrong way, then the right way, go between them a few times to familiarise the different feelings. I'd do that for 10-20 seconds, then start throw 10 kicks each leg. I did this three times a day.

Now my coaches say my roundhouse is much better, and it feels stronger on the pad.

Next thing to work on is I'm getting stiffness in the lower back (too much time sitting still in meditation) and it's affecting my kicking. I need to add in daily loosening exercises.