Welcome!
This is also my 3rd+ time around. I intend it to be my last by doing it differently. Basically I'm actually trying to follow the plan this time (as opposed to staying in induction the entire time and never working through maintenance) So far I've lost about 25lbs.
My tips are:
-Buy one of the Atkins books and read it cover to cover.
-Remember that Atkins is pretty much all or nothing. A cheat can cost you a week of weight loss. It takes 3-5 days for most people to get into ketosis (fat burning) and once you're out (by eating more than 40 carbs in one day) it can take you another 3-5 days to get back into it. Rarely worth the cheat.
-Track/write down everything you eat
-Be sure to drink at least 64oz of water and during the first week, add some sodium (like broth or sugar free powerade) to help prevent headaches
-Don't skimp on the dietary fat. This is really a moderate protein/high fat diet (not the reverse) Frying your eggs in butter, adding sour cream, mayo, olive oil etc to your food will speed fat loss.
Hope this helps and Best of luck!