It happens every round to me and most of driving range practices.
I appreciate the other posters' tips. I need to keep fortified water and a snack with me.
When this happens my woods leave me first. Not much for me to do but work my way back to the longest club that I CAN hit. The last round it was my 31 degree 6 iron. Used it off the tee and all approach shots at 120 yards or over for the rest of the round. Then I just make up the difference with a shorter shot to the green.
I prefer a 9 hole round. I really get too tired toward the end of a full 18 hole round.
Vin sounds like to need to find a fitness coach, last year i missed Q school final stage because I was soooooooo tired i couldn't hit it , ran out of gas, I have been training with a TPI fitness coach and ready to give it a try again. just something to think about, fitness is very important, yes even in GOLF
I've found a very simple alignment/ swing thought that works for me if the game goes south. Once I commit to the target I align my club to noon and my body to 11 O'clock. I focus on visualizing my shot, grip lighter than normal, pull my take away slower, and then think "swing to 1 O'clock". More times that not it produces that little draw that I love to hit. It's also helped for first tee jitters and pressure packed drives (the tee ball is the worst part of my game). I think getting back to basics and keeping things simple helps when you're swing takes a vacation for a hole or two.