As long as you are convinced that you will have a blow up hole every round, you will. Each shot is independent of all others and counts as 1 on the scorecard. No matter what happened up to any given point, you have to assess where you are and what it will take to get the ball into the hole in the fewest strokes possible. I used to go out with the thought that I would have that magical round. As soon as I hit a bad shot or had a bad hole, I would throw in the towel thinking I've screwed up any possibility to shoot a good number. Now I realize that a double followed by two birdies is even par.
Here are a few thoughts:
Don't try a hero shot unless you know (and I mean KNOW) you can execute it. If you get in trouble, take your medicine, get the ball back in play and FORGET ABOUT IT.
Always focus on the shot at hand and not the result. If you're putting for birdie or triple bogey, just think about line and distance. They all count as 1 at the end of the day.
Focus on the target and only on the target, whatever it may be. Also, pick good and realistic targets.
Finally and most important, if you want to improve, seek professional help.