Hey Drew!
You have almost answered your own question.
Simply, apply what you learn in the tutorials in to your own projects.
For example, you follow and complete the Press Start course, then using the skills learnt in this course you could create another style of console.
The key is to practice as much as possible.
Habits are by definition, regular tendency or practice.
So tiny habits in the context of learning Blender, practice different modeling techniques, practice texturing, practice animation.
practice, practice, practice.
The mistake would be to complete a course, complete another course, complete another course, and on and on.
You really need to try create something of your own to get that practice between courses.