1. No porn and no fap. No exceptions. This will keep your aggressiveness up for the rest of the list.
2. Physical fitness is paramount. You're only going to attractive above average looking women if you're physically fit, regardless of the size of your bank account. Competition is fierce. The more muscle, the better. However, being a fit and lean person like a typical competitive tennis player or swimmer will be enough to attract.
3. No matter where you are in your 20s, focus on building a social circle or non-bar venue approaching as your primary means of meeting women. Do not have swipe apps, dating websites, social media, big college parties where people don't have tight circles, or bars/nightclubs be your means of meeting women. Instead, focus on college campus approaches (if you attend college), campus extracurricular groups (if they return post COVID and you're in school), grocery stores, gyms/fitness classes, and other non-bar venues to meet women. Your approaching in this will be more on point if you follow 1 and 2.
4. Only go to college for a STEM major. Liberal arts degrees will not make for a fun time with post college employment and turning an ROI on those degrees. BA/BS degrees in Business/Business disciplines are more in-demand but even they are dicey proposition for turning a good ROI on the degree. If you get an MBA without having a STEM major in undergrad, you must go to a Top 25 school. No exceptions. You can get an MBA from a non-top 25 MBA program if you have a STEM major in undergrad. Most white collar jobs have toxic, feminist influenced environments, so you're better off following the next piece of advice.
5. Get a blue collar job. Become a tradesman. Trade school is a much better option. Some of the trades jobs can even enhance your physical fitness and help with attracting women. Don't do it for the women. Do it for the avoidance of HR and toxic feminist culture and the avoidance of the BA/BS degree in liberal arts/business and the 4 year university.
6. Realize that even if you follow 1-5, you have to keep expectations real. Very few of your romantic relationships that you start in your 18-25 years will still exist when you're 35. If they do exist, they'll probably be mediocre to subpar. Having the expectation that a romantic relationship will be continually good when the relationship is more than 5 years old is a folly. That's more of an exception, not a rule. If your relationship goes longer than 5 years, it will be mediocre if you're lucky.
