Making the right choice for marriage

The equivalent to the advice for successful stock trading to "buy low and sell high" for marriage is “Remember that a successful marriage depends on two things: (1) finding the right person and (2) being the right person” This seems to be a variation on “Success in marriage does not come merely through finding the right mate, but through being the right mate.” and then there is the Neitzsche quote I was searching for when I found the ones above:“When entering into a marriage one ought to ask oneself: do you believe you are going to enjoy talking with this woman up into your old age? Everything else in marriage is transitory, but most of the time you are together will be devoted to conversation.”and I just have to add this one: “Only choose in marriage a woman whom you would choose as a friend if she were a man” from Joseph Joubert quotes (French Essayist and moralist, 1754-1824)
You notice the last two address men in making the choice while the first two are universal.

See the rebbetzin's advice to a kallah posted by Sephardi Lady, here:
http://orthonomics.blogspot.com/2008/06/id-rather-hear-from-kallah-in-5-10.html