While I understand the need for lessons in PS, I'm wondering who can afford PS to begin with.
Anyway, what those lessons usually boil down to is a) how to remove unwanted details (like poles, people, etc.), b) how to straighten horizons (even when my horizons are tilted on purpose people will tell me I should straighten them), or c) how to boost colour saturation and sharpness. And most of the time they've never heard of using levels or layers. Oh, and they tell you you never should do "this" and always should do "that", like I can't think for myself and experiment with settings. Total BS!
If you can afford PS, you should afford yourself the time to run the built-in lessons provided by Adobe themselves. But I guess that's too much work.