Advice on trying for a baby Girl ??

Hello and thanks for reading this. I am 40 and have two boys age 2 and 4, conceived naturally. My husband and I have talked in the past about "trying for a girl" although we know there is no guarantee. But recently there has been more info about things you can do to "increas" your odds of having a girl. Many are wives tales, (like holding your legs up vertically after having sex!!) but some might be true??? I read that Taking Charge of your Fertility book a few years ago (gave it away when I thought two kids would be it) and remember she had some tips.

Anyway... I just can't decide what to do. My 2nd son is about to be potty trained and my life is almost back to normal, meaning I've been working out again, looking for a part-time job, have time for myself!! But then I get anxious that my window of opportunity to have another baby is about to close. I feel uncomfortable at the thought of being almost 60 when my potential 3rd child graduates high school...how do you ladies cope with those types of thoughts??? Also, will I be happy having another boy?? I can't imagine life without my two little boys, but will I feel overwhelmed and outnumbered if I have 3 boys plus a husband??? (boys are much more active than girls, from what I've seen of friends kids!!)

well, thanks again for reading. I look forward to your input!

-Marisa