I kinda have to agree with ^this, despite the cynical reasoning. ^^; But on the other hand, even doing a comic for funzies is still hard work, and it can be tough to find the motivation even if you aren't pushing yourself to meet a schedule.
I'm not, and yet I still feel frustrated with myself when I simply "forget" to update my current comic project for months on end. I am one of the people who are waiting to see it, the most important one, and I want to get it done for my sake, too.
With that being said, my best pieces of advice are as follows:
1. Make the work fun!
Experiment with your favorite parts of the process, whether that's sketching, line art, or coloring, and make each panel into something you really want to draw. If it's not, rework the formatting until it is.
I know this isn't possible for everyone, but for me, actually drawing a comic is often the point where I do 'final edits', as I approach each line in the script and ask myself, "is this something I want to draw? If not, how can I change it without disturbing the narrative? Or conversely, how can I change the mood/intent of the scene so that it becomes something I want to draw?"
2. Reward yourself
When my executive dysfunction is really being stubborn, sometimes I force myself to sketch panels in between matches of Splatoon. ^^ And before long, I'm drawing them of my own volition, and spending more time on the comic and less time on the game. Sometimes you just have to ease yourself into the task until a natural flow state can take over. And if it doesn't, at least you got something done that day. =T
3. Do THIS on purpose:
If you're like me, you know what these things are. ^^ Or at the very least, you know what genre or type of story reminds you the most of what you're working on, and makes you feel like you need to get back to it. Use that to your advantage, and spend your free time on the kind of media that will inspire and motivate you when it's time to get back to work.
Conversely, avoid media that will specifically inspire you to do something else. For example, pretty much every music playlist I've saved/created has a personal project attached to it in my mind, and I know the last thing I need is to listen to something that makes me nostalgic for Project A that's never gotten past the design phase, when I really need to work on Project B that hasn't been updated in 6 months despite being 2 short chapters away from completion.
...Although sometimes I end up giving in to temptation and working on Project A anyway, and that's honestly fine too. ^^; Sometimes it helps to just get passionate and motivated about something, and that energy will bleed into whatever you decide to do the rest of the week. My worst habit is spending days scrolling Twitter/Tumblr/YouTube and not drawing ANYTHING, so any artwork that I can get excited to do is a net benefit for me.