I calculate constantly until I find (what I think) is the best move. Once I do, I stop thinking until my opponent responds. The reason is I don't want to waste time thinking about variations he isn't going to play anyway. Maybe this isn't the most efficient way.. but I usually stay out of time trouble.
How to Think in an OTB tournament game
You train mental endurance the same way you train physical endurance. Get in shape, work out, run, etc. Your brain uses energy and needs blood flow like any muscle does, so get your cardiovascular system in good shape, and that'll help.
Get up from time to time, at least once an hour, to keep your blood flowing and stretch your legs.
To help with your time situation, whenever it becomes a factor, I've heard to calculate variations on your time, and look at your overall strategy and positional factors on your opponent's time. This way you aren't wasting time calculating candidate moves that can't happen because your opponent played a different move, but you are still using his time to your advantage.
I think this was great advice. I do calculate variations on my opponents time and I think this contributed to the fatigue. I will keep that in mind the next tournament. I'm skipping out on US open because I want to keep my master title before the next supplement lol
Also, congratulations on your master title! Be sure to submit it to chess.com for (I think) free membership, not to mention that sexy red "NM" next to your name.
You train mental endurance the same way you train physical endurance. Get in shape, work out, run, etc. Your brain uses energy and needs blood flow like any muscle does, so get your cardiovascular system in good shape, and that'll help.
Get up from time to time, at least once an hour, to keep your blood flowing and stretch your legs.
To help with your time situation, whenever it becomes a factor, I've heard to calculate variations on your time, and look at your overall strategy and positional factors on your opponent's time. This way you aren't wasting time calculating candidate moves that can't happen because your opponent played a different move, but you are still using his time to your advantage.