Went to the gym, and focused on 5x5 of benchpress, squats and deadlifts. As soon as I had some definition, women were way more receptive to advances

Got some well fitting clothes. Figured out that brand actually matters, women notice your sweater is from J crew or glasses are from Oakley.

Stopped being friends with women. Honestly, this was the biggest one and seems like a no brainer. If you make it clear from the start you're interested in a woman and don't want to be friends, it dramatically increases your chance of sleeping with her.

Realized the most valuable thing a man can offer is his time. So learned to walk away and not put up with petty bullshit just for a shot at sex.