Losing a pound or two or gaining a pound or two is perfectly normal on a day to day basis. Don't beat yourselves up over it. I get incredibly frustrated when I lose 5 pounds one week, and gain 7 the next.
My story (I haven't read all 30 pages) is a bit different from most.
In July of 2008 I had a RNY gastric bypass. Prior to surgery, I lost 30 pounds using diet and exercise. Post surgery, I have lost another 170 pounds. I am down from 372 at my peak, to just over 170 now, and a size 28/30 to an 11/12. Yes, I feel amazing, yes, I am extremely proud of myself. I am wearing smaller clothes now than I did when I was in 6th grade.
Right now, I consume roughly 1000-1500 calories a day. How much of that is actually absorbed, I'm not sure. I have that advantage, as well as intolerances of high fat and high sugar foods, to help me.
I do, however, have about 20 pounds to go to reach my ideal weight/height, and I am finding myself slipping back into my old snacking habits. I need a kick in the tailfeathers to get back into the gym.
So I'm in.
What my dietician recommended is.. eat your protein first, then your veggies, then your carbs. Chew slowly and throughly.. It takes your body time to register that it's full. You should be putting in roughly a half hour to 45 minutes to eat a meal. I don't need people telling me how hard this is to do.. I know. Not only do I have two small children (4 and 2), I also work full time + mandatory overtime, am working on my bachelors degree part time, and running a household. I also eat 5-6 times a day, even just a hardboiled egg or a yogurt.
You have to retrain the way you think about food.