What do you do to Improve Your Chess Calculation?

Fellow study group members.  I try to play OTB ( over the board ) matches/tournaments whenever I can and as any OTB player knows, time/the clock is a huge factor in your OTB game play/performance.  Historically I am a slower player and while steadily improving in this area, in my most recent tournament, more than half of the games were lost due to errors made while in time trouble.   In my post mortem of my tournament performance  ( post game analysis with my opponents and game review with stronger players ) it was suggested that I work to improve my ability to calculate ( stronger and faster ).   I am currently working my way through Aagard's book on calculation and considering the "Woodpecker Method" but I though I would ask the group what you guys are doing, have done to improve your calculation?

Improving calculation.

1 understanding the tactic, not memorizing it.

2 understanding the position not memorize it

3 understanding the strategic issues

4 practice visualization and taking ability.

@TheSultan31003.  Per my comment in the group notes area, amazing/impressive and thorough feedback.  Regarding your points. 1) I have recently stepped up my tactics training and have noticed a breakthrough with my ability to see 5 move deep tactics and solutions in total ( previously I could only see 3 moves deep with regularity ).  Working on getting better and spotting tactics in my own play and from my opponents perspective ( still working on this as it seems to be taking me a while to look for and see tactics in my day to day games ).  I agree with practicing them OTB.  I try to mix in online chess.com tactics on the computer, setting up computer problems on the board and solving them on the board and working through the combinations in tactics books.  I think I will adopt your 15  time limit for solving problems ( need to work towards this ).

2) Practice blindfold chess ( I started doing this about a year ago using an app of the chess program on a Mac ...which takes audio commands ) but have not been able to practice with another person to date.   I am going to start to work this in to my training as the benefits of visualization alone I think are tremendous ( kudos for doing this regularly ).  

3) Now this one is new to me ( practicing to solve a position from both a tactical and a strategic perspective, full position analysis etc.).  I love the idea of it.  Very rigorous approach and I am going to add this to my training regimen

4). Another new approach/idea that I think it great and I will try to figure out a way to work in ( at the moment I do not have a dedicated training partner to be able to do this will but will see what I can do on this front.

5). I am currently working though a few books ( one of which is the mammoth book of the 100 greatest chess games ).  Definitely going through these on the board.  Working through various lines on the board is also a great Idea.

6). Actively working on this.   I do currently struggle with the understanding and intuition to know when to slow down and use your OTB time wisely vs. not.  Thank for your the insightful response!

Thanks a lot to @Silledad, @Leon-Campeon and @TheSultan31003. I really want to improve my calculation. I'm trying to build a plan for my overall study of the game. Your suggestions will surely be of great help...

Heard very good things about https://www.chessable.com/chess-calculation-training-middlegames/course/12376/ .  However they generally recommend tactics till about 1800 ELO, and then switching to calculation training since calculation is too hard until you have the basic patterns in your head already.   I certainly their medium easy tactics books challenging for me.  So I'd stick with the recommendation.  Above course is supposedly possible if you are 1600 ELO and good at tactics but that would be IMHO the absolute minimum.   

@jbolden1517. I would not agree with the perspective that calculation is too hard until you have the basic patterns.  I believe that having the basic patterns greatly enhances your ability to use calculation to a fuller potential.   Think of it reading and writing, you can put together and read when you know your letters and how to string them together to make words ( raw calculation is similar but move useful in chess ); however, once you have a large vocabulary of words and phrases, you can not only read faster and comprehend/communicate deeper but you can now enhance your ability to read ( calculation in this example ) by pattern recognition and you see faster, with greater understanding and read faster ( and likewise use that enhanced ability in your recognition and planned responses ).   Long winded I know but you get the idea.     

     Given the time in a long match I have always been able to calculate deeply and match much higher rated players but I burn a lot of time on the clock at the board doing so.  With pattern recognition will be able to see quicker and calculate deeper when needed and based off of chunks of already recognized patterns ( and use less time in the game ).   

.  Interestingly enough I find that improvements in my calculation are what allow me to solve harder and harder tactics puzzles