Some things I have learned when it comes to 3d modeling is that speed is key to accomplishing your goals. To accomplish that you need to really know and live through keybindings. In a way this helps you keep the pace as you are spending less time roughing it and more time developing your models. Speed modeling is also something I think everyone should consider doing to a lesser or greater degree as it helps speed up common processes by training your brain. This takes a lot of practice of course, but I do it with my friends and we are developing competitively to where we are producing full models in 4 hours or less. Granted there is some sacrifice when you speed through things, but as you learn short cuts around tasks the quicker your process and more effective your actual time modeling. This of course comes along with others have said about dedicating time to the process.
As for the lessons, I am an old lifetime member and I remember a time before the flows and as I have seen this site develop more and I have more time to invest into it, I am seeing a lot of progress when it comes to organization of content to make it easier to go through. I think there can be some improvements. The Flows and Bootcamps are wonderful, but I think something like a Production Pipeline training from beginner to intermediate to advanced would really attract more content seekers and help the Blender community overall. I think this is a learning process and as time goes on this site continues to grow and improve.
I would love to see the old tutorials get a refresh with some goals, xp, exercises, etc, too if I was picky. 🙂