Make a list of everything you're looking for in a woman and assign a number according to how much you want that quality in a woman. The most important ones get higher points. Those you can take or leave lower and not as important. Make another list, this time of things you hate and won't accept- 'red flags'. Same with the points, high and low according to what you hate the most. You can rate a woman you've never met but it's more accurate the more you get to know her. Good thing women broadcast everyfuckingthing about themselves so they're easy to rate. You won't finish the list in one sitting, you never really finish it. As soon as you meet a woman that does something fucked up you didn't expect you add it to the list. To make it more accurate I try to have the positive traits equal the red flags so it's not biased against them. When someone makes me add a red flag I think up something positive and add it to the list. I've done this to enough women that I know by her score exactly what to do with her. If she gets x amount of points she can last a night, others get enough that I want something more serious. I've actually done this for guys and know if I can trust or be friends with them. I've rated myself. A good rule of thumb is a woman has to get the same score as you for things to work out. This system has not failed me yet. If you're honest with it it works shockingly well.