If I am not mistaken, Diet Coke uses aspartame, highly discouraged. You are better off without any sodas, diet included, but a few do use Splenda, at least look for those if you simply 'must.' Mayo is great, look for one without added sugar. "Duke's"
is one name that comes to mind. Shakes... real food is better, really. Much better. There are so many things a person on Atkins can eat! I am eating two eggs scrambled with a cut up bratwurst and pico de gallo.. yum.
This forum
Atkins Low Carb Dieting - FAQ's - Atkins Diet
will answer a lot of questions, has the induction list, etc. until you can get a new 'bible.' Take care!