Yeah definitely. Art may be formed from the mind, but your brain still needs breaks just as your body needs breaks from running. I use this sort of example a lot, but you could have the best, most fun series to work on in the world, but you'ld still need to take breaks from it from time to time in order to keep yourself from burning out.
Another important thing, however, is I had to learn to discipline myself not to think about any other ideas I have. Because at any given moment I probably have five or six story ideas, all ones I think are great and I'd love to get out there, but if I let myself focus too much on one of the ideas I'm not actually doing, then I may start feeling like my current projects aren't worth working on, and may end up prematurely feeling burnt out over something I may have been able to keep doing had I disciplined myself better. I've almost started working on some of those ideas, but immediately started feeling super stressed over what I was already working on, so it was a pretty solid cue that it was better for me to back off on those and just focus on what I already have. Too many projects I've tried doing in the past ended up crashing and burning because I tried jumping from idea to idea because I was trying to find the perfect one that was the cream of the crop, the best of the best, the idea to end all ideas, but I ended up in this miserable circle where nothing I was working on felt good. I've mentioned elsewhere that it took me two years to plan out Paisley Brickstone, and this is exactly why it took so long. The end result isn't even something I think is anywhere near perfect (hell, some of the other ideas I had might have even been better), but rather where the plans were at when I finally told myself enough was enough and I needed to just run with whatever I felt I'd have the most fun doing.
I guess a terrible, creepy analogy I could make from all this is making comics can sometimes be like dating someone. The more you think about other people you could be dating, the less appealing the person you're dating seems until you get to the point you just want nothing to do with them. My comics are my datemates, and my other ideas are all those attractive people around me that my mind wanders to from time to time. I have to treat my datemates like my one and only until they're finished or it feels time to move on. Okay, I'm done saying creepy stuff now. Disclaimer, I am not dating my comics. Just don't tell them that.