I freeze about 75% of my food and most of it turns out really well. Stir fry freezes really well or any combination of meat, vegetables, sauce and rice. I froze thai green curry for the first time this week and was very happy how well it turned out. These I freeze altogether with everything in the container including the rice. White rice tends to disintegrate, but brown rice keeps its texture really well.
For fajitas or things that are vegetables and meat with no sauce, I freeze the veggies and meat separately, otherwise the meat can get wet and kind of gross when microwaved with the vegetables. I freeze baked vegetables and potatoes to eat later. I freeze pre-cooked, shredded and seasoned chicken for my buffalo chicken salad. I do not freeze the sauce (yogurt, blue cheese and vinegar)though (it turned out really badly).
I think the key is to portion your food before freezing. Once it is frozen you want it to remain frozen until you are ready to warm it up and eat it. The more often you defrost and refreeze the item, the more damage you will do to the food.
I use freezer safe containers and have had no problem with freezer burn. My containers are sale products I bought at Linen's N Things but they do have the little symbol for freezing and microwaving on them. I also don't leave anything in there for over a month really. Since all of my items are pre-portioned and pre-packaged, it is really easy to just grab a meal out of the freezer for lunch or snack. And on those days I just really don't want to cook, I usually have several options.
If you have any questions about whether something is ok being frozen, I suggest portioning the meal into containers and freezing one of them. Try it the next day. If it is horrible, you still have the rest of the meal in the fridge. If it is ok, pop the remaining portions into the freezer for a later date.
Hope this helps