Not relative to hunts, I didn't stop drinking to be a better hunter.
Since stopping drinking I sleep MUCH better, and a good night's sleep is much more important than the transient taste of the best booze. No, it's not easy. Especially in social situations - actually, it WASN'T easy to start, but nowadays being a non-drinker is being iconoclastic, which serves my tendency to be contrarian, so it's easy to be odd man out.
The mindset is this: you have to be a non-drinker. NOT someone who is quitting drinking or just doesn't want one when offered. Being in the middle of quitting something means you still do it, just less often.
When someone asks if you want a drink, the answer is "I don't drink" not "No." Big mental difference.
If you are married, tell your wife you are not drinking anymore. Any booze that was just yours in the house, give it away. Non-drinkers don't have their favorite booze on the shelf. If you use the excuse that it's for when people come over - ask yourself if you also stock your fridge with their favorite food in the off-chance they stop by? If you want to serve booze when they come over, buy a small bottle and send it home with them. Eventually they will just bring their own, or booze won't matter anyway.
These of course are my opinions/experience, but it works for me. Also, I have never 'saved the date' of my last drink like some people do. "it's been XXX days/weeks/years since my last drink." I never understood that. I am just a non-drinker, period.
Booze is not necessary, nor important in any case whatever.