I'm going to throw in the ones I see:

Sleeping with an ex: A close friend is doing this one right now and I'm shaking my head. They just broke up about two months ago, and she's still spending nights with him. I want to shake her and tell her to have more self-respect. He's not going to get back together with her, so why is she spinning her wheels on a guy who's not going to give her what she wants?

Making snap judgments: A lot of women being too picky with men come from making terrible judgment calls. They'll extrapolate one hobby or trait and assume it means he'll be terrible as a partner. This is true in some cases, sure, but far from all. I've seen women reject guys for drinking too feminine a beer, for using text shorthand instead of full words (despite being very bright), for having too "juvenile" of interests (like kickball)... all sorts of alleged deal-breakers that are far from it. I don't know if dating profiles have contributed to this in which women almost have to make such snap judgments before swiping left or right, but it's a trend that should die.

Wanting the right guy to fall into her lap: Men already know what women often seem to miss--finding "the right guy" is, to a large degree, statistical in nature. The odds of finding someone increase when you put yourself out there.... but you have to do that first. I see women reject online dating, which is their prerogative, but it comes at the expense of prolonging the search for a great man. At the very least, women should use online dating as practice for valuable habits like developing quality conversation skills, refining what she wants and doesn't want, and developing realistic expectations.

Acting like a wife too quickly: For men they really like, I see women bending over backwards to paint a picture of domestic bliss in hopes of securing a ring. I agree with cooking for him occasionally... but not every time. I agree with cleaning his place sometimes... but not every night she stays there. It has to be a treat. This is partly why I think it's unwise to move in with a man before marriage.

Spending over 4 years of prime time with a live-in partner/boyfriend: If at the 2-year mark there's no engagement ring most women in their 20s (even 30s) should walk. I also think it's very easy to be romantic and idealistic about one's commitment level to each other when a woman is at her dating prime (her 20s), but the true test of commitment is when one is not at their most desirable: when sick, when unable to have sex because of illness, when in her 40s when she's not as attractive as the young 20-somethings... this is why marriage is such an important institution. Marriage exists to make both partners think longer and harder before pulling the plug. When a woman is in her 20s and she says her relationship is as solid as any marriage, my response is kinda, "Well duh, of course it is today." It's equivalent to a man not wanting to trade in the new car he loves--why would he when he has the latest and greatest model? While I don't mean to literally objectify women as cars here (though I for one plan on trying to age like one of those timeless classic Aston Martins), the point remains that true loyalty is best tested over time.

Not knowing the difference between love and lust: After a few years, the relationship with your SO will look/feel nothing like the honeymoon period. Ideally it'll be a different kind of great, but it will be different nonetheless. This is why I personally don't place much stock in the honeymoon phase warm and fuzzies, other than the fact it established baseline physical attraction and adoration. Nonetheless I think both of these things can--and should--develop over time. A mistake I see many women make is to assume there should be fireworks at first, there should always be those fireworks, or that something is wrong if that initial excitement wanes. Underlying feelings of ennui with one's relationship often dovetails with ennui about one's overall life. When women get busy and focused back on their own life, their relationship malaise usually clears up, too. Expecting the relationship to provide all of one's excitement will result in problems.

Do you agree or disagree with any of the above? What else would you add to this list?