Not quite at that age yet but I can pass for mid 20s despite being in my very early 30s. I haven't fully incorporated all of these yet but they are a work in progress.
Echoing what others have wrote but...
1) Check you diet strategy. Despite being "healthy" a lot of people have some type of food allergies/intolerance to normal "health" foods. They develop bloating, acne, hormonal issues etc but they think it's normal because they haven't known any different. "I'm eating kale and it's healthy but I still have face bloat..."
Experiment a bit with this and find what works for you. I'm finding more and more that mostly "carnivore" type diet is working for me. It's about 85-90% meat, broth, eggs, butter, cheese. I'm trying to do 1 total day of fasting a week - typically light water on the day since this helps "clean me out" and reduce lethargy. Then I have a "normal" day which consists of mostly carnivore but maybe a few treats I like. I've noticed a lot of fruits and veggies bloat me and make my skin worse so I stick with what I know works for me (blueberries/dark chocolate and some other fruits) It's still a work in progress since I have bad sugar cravings but I'm working on it.
2) Stay consistent with the gym but don't kill yourself. This means not just strength training but also being fit in terms of cardio, flexibility, high intensity anaerobic exercise and general injury prevention. Being able to hit the gym 2-3 times a week and getting in some stretching/cardio is much better than killing yourself for 5-6 days a week and getting a bunch of injuries. I'm STILL rehabbing injuries I got at 22/23.
3) Keep up to date on styles. Taper it to your age group - you don't want to be dressing like a 20 year old at 50 but you can balance and blend classic style with modern style. T shirt and jeans come to mind or a slim fit sweater with good denim - lots of examples online.
4) If you need minor surgeries to stay looking younger then do it. Who cares if it's 5-15k when you will change your life for years? If that's a lot of cash to cough up then find ways to make more. I plan on getting a hair transplant eventually even though I haven't lost a bunch of hair yet but I definitely notice it thinning. If this lasts me 10-15 years then it's 100% worth it. Teeth fucked up? Start
mewing and maybe get invisalign. Oh and carnivore diet actually made my teeth straighter and whiter after a few months. ALl that chewing action helps keep your jaw looking solid too.
5) Stay social in other avenues/interests groups - this keeps you well balanced. Don't be the dude who just works 70 hours a week then only hits places to day game - people notice the oddity of it.