Here recently it seems like everything just gets under my skin so quickly and easily. It's not that I get mad and take it out on others, it's just the fact that I'm constantly annoyed and stressed. Something as simple as the dogs tracking some mud through the house will just ruin my mood. I know some people who would just laugh it off and clean it up. Meanwhile I'll get pissed that I didn't wipe their feet and be mad the entire time I'm cleaning it up. This has nothing to do with the dogs, it just an example. Any number of seemingly insignificant things can trigger me like that. Like forgetting something at the store and having to go back. I would love to be able to go, "well that sucks" and just get over it.
For me: get enough sleep and/or do exercise. Getting 9 hours is my ideal but I settle for 7 more often than I should. As for exercise: running, hitting the heavy bag, jump rope, rowing, weight lifting, swimming, walking, VR boxing (got too sweaty for it to be a long term thing), rock climbing; all these things have been good over the years or whatever you want. Cortisol builds up in your system and exercise breaks it down. You can't be stressed if you're exhausted. I think of the two as shielding and loading. Sleep increases my shielding from stressors and exercise decreases my baseline stress load. The two together are the actual answer, in my opinion.