I was searching on youtube and happened upon an amazing photoshop teacher named Unmesh Dinda. His youtube channel is PIXimperfect and he is simply amazing! His videos are free and he is fun to watch, his instruction is snappy without being too quick, and he is a master of photoshop. I go to his youtube channel and he has years worth of videos and you can search them by subject if there's one thing you're trying to learn to do. That's how I go after it otherwise it is overwhelming. In each video, he shows various ways to achieve your editing goal - the pros and cons of this tool vs. that tool- and he
shows how and why they're different and what situations they work best for. Did I mention he's a hoot? It's super fun watching him and I have to be careful or I'll just spend the evening watching Unmesh and forgetting what I was supposed to be doing. Seriously. Amazing!
PiXimperfect - YouTube