A big part of it all is making sure your update schedule and update length allows for "days off" between updates. What I mean is... say you want to update weekly. You can manage to do ~21 panels in 7 days(or about 3 a day)... this would mean you always have to work every day to maintain 21 panel updates every week. Instead I suggest doing 15-18 panel updates a week. This would allow you to complete your work in 5-6 days, giving you a day or 2 of down time. You can use these off days for separate art projects if you like, or to build more buffer, to relax and prevent burn out, or just spread out 5 days of work over 7 days and have 7 easy days. Or some updates you may just want to spend extra time on certain panels and now you don't need to rush those. I mean how you spread it out is up to you, the important thing here is it gives you flexibility to do what you want.
This will help ease random hiccups in the week that could slow you down. It allows you the opportunity to build buffer if you don't already have it, or to rebuild buffer if for some reason the buffer got used up due to illness or something. It allows you to have a life outside of comic making. But most importantly if helps reduce pressure and give you options in your work load.
Once you establish this the rest is buffer and discipline. The buffer is necessary to help avoid unexpected hiatus, you never know when something may come up and need your attention for weeks, or an injury that slows you down, or something. So having a buffer gives you more flexibility to deal with those scenarios.
The only trap with buffer is this sense of security with it, you need to maintain your schedule and stay disciplined so you don't needlessly deplete the buffer.
And lastly if you can manage a buffer, try to have a small handful of beta readers or friends who like your comic and don't mind reading the buffer. Cause I dunno about everyone, but I know I get an itch for some immediate feedback, I have about 3-4 people I send my stuff out to and usually one of them is able to give me some comments about it right away. This helps prevent me from impulsively publishing stuff right when I finish. It also allows for some typos to get caught and fixed along the way.