This!
Confidence, fitness, and an aura of success is more attractive to high quality women. The experienced gentleman also attracts smart women with their own careers and earnings rather that some little bimbette seeking to leach off of a sugar daddy.
Exude confidence
Stay lean and have some muscle definition.
Dress and groom yourself well - this is super important! Nothing is sadder than a grey haired man schlepping around in a baggy hoodie and basketball shoes like a college boy plus it makes you look older.
In clubs, parties, and office gatherings, show refinement by drinking straight liquor, classic cocktails, or wine. Don't act snobby but, it sets you apart from the boys drinking beers or mixing booze with energy drinks. Added bonus, you don't lose a prospective date because you are leaving her to piss every 20 minutes.
Learn to dance! Women love it and will line up to get on the floor with you. Most young guys won't because they are too self-conscious and you just made yourself the most desirable dude in the place.
Show respect and interest in her - this will distinguish you from the himbos pressuring to close the deal by last call.
I was balding before I reached 30 and that's a tougher sell than a few greys. Dating wasn't an issue because I owned it, kept my hair trimmed very short, and did the things listed above.