Hey Robin,
Your question about the lean cuisine meals is a good one... Basically, any food that isn't in it's original state (fresh or raw) is considered processed. I found this list of commonly bought processed foods that are generally considered less healthy than fresh foods:
-canned foods with lots of sodium
-white breads and pastas made with refined white flour, which are not as healthy as those made with whole grains
-packaged high-calorie snack foods, like chips and cheese snacks
-high-fat convenience foods, like cans of ravioli
-frozen fish sticks and frozen dinners
-packaged cakes and cookies
-boxed meal mixes
-sugary breakfast cereals
-processed meats (hot dogs, bologna, sausage, ham and other packaged lunch meats)
The reason that they are less healthy (and sometimes not helpful when it comes to weight loss) is that they are often loaded with the things that we all should be avoiding... like too much sugar, refined flour, tons of salt, chemicals, trans and saturated fats.... and the list goes on.
With that being said, your best bet would be to start reading labels and comparing products.... It can be very overwhelming, so what I do is just pick one thing per grocery trip that I'm really going to look at carefully, (for example, peanut butter) and compare a whole bunch of different brands and versions of the product ('low fat', 'low sodium'...). It takes a while, but eventually you can pick out the 'best' products for you.
It's always best to make food from scratch, but if you have to have some pre-packaged or processed foods, then maybe try to compromise and have a lean cuisine dinner, but make the rest of your meals that day from fresh ingredients... or some variation of that...
I think it's a good idea to limit the amount of red meat in your diet, I don't think it's necessary to never eat it, you just want to stick with the less fatty meats for the majority of meals... and no I don't think that organic is worse at all... probably better in fact (if you can afford it

)!
So once again I rambled a bit... just hoping it's helpful to you as well as others who might see the post!
Cheers,
P.