Looks like a good website specially the posture which I'm quite bad for, however the ab one seems hard;
"Abdominals. Here is a trick that not only makes you look amazing but supports your lower back as well -
constantly keep you abs flexed. I can hear your disbelief now, no I'm not crazy. I got this tip from Bob Paris' book "Built" in the early 90's and it has helped me ever since. The abs do a marvelous job of supporting and protecting the lower back, if you let them. Suffering from chronic lower back pain I was searching for a non-surgical solution to my problem when I read Bob's book. Here's what you do, when you are walking or moving, keep your abs flexed - its not as hard as it sounds. With a few months of practice and reminders from a friend/spouse it can become automatic. At first, practice standing in front of the mirror with the abs flexed and make sure to incorporate the pelvic tilt correction above as well - look at yourself sideways in the mirror both relaxed and with corrected posture and ask yourself which way you want the candid picture of you taken at the beach."
Edit: not so sure on his strong dislike of eating fat in your diet, I sure as hell aint wasting a good egg by throwing away the yoke:
http://www.scoobysworkshop.com/MythEggs.htm