Every woman should know that only she herself can 'make' herself happy.
Never try to lay 'happiness' on someone else.

Every woman should know and be able to implement that having children is optional.

Every woman should know that just having a man is not the be all and end all of life.

Every woman should know that it is very very OK to like and even LOVE other women regardless of 'sexual preference'.

And dammitall, EVERYBODY should know how to cook!!!! Even the dogs should know how to cook! (grin....)