The list still applies if it’s just retopo and clean mesh modeling. I guess what you’re trying to say is, I don’t want to burn out, too many courses is a heavy load. Could I get a thinner list? And of course you can.
To simplify things, maybe how I did things will resonate with you. I just stayed with what I was doing until I felt I was comfortable with it. So I stayed with sculpting until I felt a handle of it, I just practiced sculpting for 2 or 3 months before I moved to modeling. Then I stayed with modeling for like 6 months until I felt I had the hang of it, only then did I move to UV’ing and texturing, and so on and so forth. It took my a while but I avoided burn out and feeling like I was overwhelmed.
So here’s the new list if I was going to focus on tutorials only to polish my mesh modeling and clean up skills:
https://cgcookie.com/courses/core-fundamentals-mesh-modeling
https://cgcookie.com/courses/rev-model-a-low-poly-muscle-car
https://cgcookie.com/courses/pothead-create-a-hard-surface-character-in-blender
https://cgcookie.com/courses/basemesh-create-stylized-characters-quickly-with-blender
https://cgcookie.com/courses/astray