The hardest thing for most people is this: they can hear something is not right but they don't know what to fix. For example, you often hear the advice about boosting the EQ and sweeping the frequency until you hear the bad thing. You are supposed to note that frequency as the place to cut. In real life, when you boost like that, almost every frequency sounds horrible if boosted significantly. And, as we've discussed on another post, EQ can be deceiving. For example, I had a female vocal that sounded too hard and loud every time the note was around the E above Middle C (approx 330hz). The answer, however, was not to cut 300-400 Hz, but to cut around 2.5K.
Similarly, you can understand what everything on a compressor does but still have trouble getting the sound you hear others get.
What would be helpful would be examples in which someone played a mix or track, talked about it, and then showed specifically what was used to correct various problems. For maximum value, this would consist of various tracks and songs that had different characters. Tutorials on a single song are interesting but limited in value.