The key for me is regular, heavy strength training. I exercise 3-6 days a week, all compound lifts, at high weight/moderate (3-7) reps.
More than just managing my physique, I find it immensely helpful for my mental health and general well-being.
I’m not the biggest or most shredded guy in the gym, but the focus on strength keeps me from obsessing with aesthetics, while everyone who knows me has still noticed the changes to my physique.
My point in all this is that exercise and sufficient calories is more important than following a specific diet, and that it’s been a solution in multiple dimensions of my life. I heartily recommend it to all my friends.