Hi kwinkle,
So glad that brewhaha on the other board didn't scare you away.

Sometimes people get feisty.
I use the
sparkpeople recipe calculator to figure out recipes. It can't tell you how many calories are in a tablespoon of a recipe or a cup, but if you know how many servings you'll get, it can tell you that. I do a lot of cooking from Everyday Food magazine and that has the nutritional info in it.
Eating breakfast is definitely a good idea. Study after study shows that people who eat breakfast consume fewer calories over the course of a day compared with people who skip. Time and time again, my thinnest, fittest friends emphasize the importance of protein at breakfast (which you achieved with the yogurt). I know I LOVE cereal, but it always leaves me hungry well before lunch. Today I had an egg+egg white scramble on half a sandwich thin and that held me until lunch.
Some people have a rule that they have to record something in their food diary
before they eat it. I bet that's a really good way to avoid going off-plan -- especially if you're using a program that shows the calories! I haven't done that yet, but part of my maintenance plan is to plan out my day's food in advance so I don't spend so much time thinking about what I'm going to eat next.