My advice would be to stick with a road map. Have a goal in sight, whether that be an end goal at the finish line of your story, or just plotting through the next few episodes. One is less likely to feel lost or unmotivated if there is a destination (no matter how near) in sight.
I'll be the first to admit there were times I just didn't feel like drawing a comic page, and I took a break to heal my mental health. Don't be afraid to take care of yourself! It's not worth working yourself to death! But what motivated me to pick that stylus back up again was I had the end of Demon House sitting right there in a word doc as a script, waiting to get visualized and published. I was in this deep already, might as well finish what I started!
I've also had plenty of other projects I've shelved production on over the years that I'm unlikely to pick up again. The one common factor between them all is that their storylines went nowhere.
So yeah, definitely have a plan and set goals. Big goals like finish this project, little ones like finish this arc, or minute ones like finish this panel.