(NB Shamelessly stolen from the original Eisenhower Matrix )
Start by thinking about the various skills involved with playing chess. The decide if you (a) Know/Don't know it and (b) it is important/not important
Then prioritise according to the following
Not important + Don't know - Ignore
Important + Don't Know - Learn
Not important + Know - Remember
Important + Know - Practice
The trick is moving these skill topics between categories. When you first start out, Checkmate with KQ or KR is important, so you firstly learn (Don't know -> know), and then practice. After a while you can shift this from Important to Not Important (mainly to make room for more important items), when you simply need to remember it.
This method becomes more effective if you attach it to a goal.
