Your opinion is valuable, your advice even more precious. So, save it. Keep it for yourself. Odds are, you need it more than I do. So, please don't give that sh*t away, certainly not without even being asked, lest you be perceived as promiscuous.
After my friend left I thought, what is wrong with me? Why would I just spew out unsolicited advice like that? Then I realized why, and I realized it's the same reason people offer unsolicited advice to new mothers.
What is with people feeling so free to share their opinions as to how we're performing our jobs as moms and dads? The way I see it, these so-called "words of wisdom" are -- like a bad mood or a bad recipe -- better left unshared.