believe me, i do not practice what i preach!! fortunately, i don't have a weight issue (i'm no twig, but i'd say i'm a little above average). my thing is, i don't practice what i preach regarding caring for children. i'm a peds nurse. my daughter consumes sugar (yes she does), i'm not sure if that's why she's hanging from the chandelier right now :chuckle (she's a spirited almost five year old, lets just say). she's not big on the veggies, i didn't breastfeed, and she sleeps in our bed (now before anyone comments, if we wanted her out of the bed, we'd put her in her bed!!!). and you know what, i'm happy with the way she turned out!! so it's kind of hard for me to preach these things and say 'you must do x,y,and z. (please do not preach on the benefits of breastfeeding, i know them- it didn't work out for me- i would never deter someone from doing it though).
also my hubby smokes- but he's lost 60+lbs on atkins (and still going), so i doubt he'll give that up right now. another thing i wouldn't necessarily preach.