If you are still in opening THEORY (if he goes out of the main lines you should check to see the reason why its not theory) you don't need to calculate. in a positional middle game, you should rely more on you understanding of the position rathen then calculation so you only need to do 2-3 moves deep. if the middle game is more tactical you should take lots of time to calculate to check for tactical shots from you and your opponent 4-10 moves deep i would suggest. in the endgame you should 2 minutes per move (unless its a fast game) so in a known position you can check your knowladge and make sure its ok, a little slip can be desisive, in a strange endgame you should use a mix of strategys, take some time to understand the positon and some time to calculate.
one more tip 1. you shouldn't anaylize every move possible, that will waste time and make you tired.
Im a player who is very reliant on calculation .You can call me obsessive compulsive,paranoid or just a perfectionist.Even in quiet QGD positions i really look deep into the position.
It pays off most of the time but in long tournaments,exhaustion is my main enemy.
How do I go about this dilemma?