@nathanKmcwilliams
I would go as far to say if you really don't want to practice, just don't.
However, let that be an indicator of what you would like to make a career out of. The quality of my art improvement (and ultimately compensation) was never determined by the quantity of time spent drawing. It was mostly determined by how many ideas I tried to incorporate in each practice.
I noticed this from doing my hand gestures. There were so many techniques I wanted to try and add. I only practiced a couple hours per week and improved so much faster because I was fully present and devoted to experimenting the process. This made me want to practice more regularly.
@cookyroach Now that you mention it, I think the line is definitely a little different per external factor. Ultimately the choice to try/do things is what determines us. Sometimes I'm fatigued after work to the point that I don't want to practice. Really that's not the truth. The truth is I just don't want to be too tired. So I go out of my way to grab some coffee and do some yoga so I'm in the mood to work on stuff, and plan on a new sleep schedule. But If I'm not willing to solve the fatigue issue, that shows a deeper issue.