We elect two:
First stay focused for a long time in a tournament. I always do something stupid.
According to my reading range is somewhat limited, I believe that play well with what I see, but I have difficulty reading than the opponent can have. I believe this is essential in poker.
Some literature suggestion, or you own tip to improve these two points?
Focusing is going to be a big one for a lot of players, including myself, which leads into making incorrect plays. For me if I can't start the tournament from beginning and commit to the end, I won't play.
MTT's take longer than most expect and you have to adjust in the different stages.
Early stage- see as many flops as possible for cheap, try and build that stack (the goal is 1st-3rd place)
Middle stages- if you have a decent stack you can still apply pressure but tighten up a little.
Late stages- If you have a big stack close to the bubble, apply pressure.
Late stages is where it can get tricky because as you said about reading players wrong, if you don't have a solid read an your opponents hand range, its okay to fold. You're still in the game. You lose some chip EV but there are future ICM calculations that you can imply. In other words, if your not sure, why risk it unless that specific hand would win the whole tournament? The goal is to win the tourney, not be correct about opponents holdings. If its a cash game it would be different, chip EV would be the only thing to worry about and you will have to focus more on raising and calling ranges of the opponents.
But in a tournament, even if you're correct about their hands if you get unlucky in the late stages in a tournament, you being right did nothing and it still cost you.
Now the that sounds result oriented, and it is, and you can't keep folding the best hand long term, its just not good theoretically and not good poker in general. That being said you can sacrifice some chip EV along the way if it means you'll get further it a tournament.
Good luck!