(to continue) … tesuji, basic life and death problems, endgame tricks (kind of part of closing the boundaries), maybe even quick counting tricks A little game I made to practice counting quickly - #10 by yebellz.
There’s actually a lot to learn about how to efficiently read right? How to recognise vital/important points to focus on potentially useful variations. How not to do wishful reading for instance 
Katteyomi at Sensei's Library