The main thing I do is just push myself to do it anyways. Even if it feels like no one is reading it, I can feel accomplished that I did it.
I've got about 30 subs here on Tapas, and a few regular readers on Instagram, but for about 6 months I posted on Facebook and maybe got one like every few pages, and I was promoting it in a lot of places.
That was a huge blow, feeling like I was posting into a void, and I almost wanted to quit. But I remembered that making these comics and stories is something I wanted to do for a long time, and if I didn't do it for myself, then that was the ultimate failure.
So ever since then, I determined that "success" for me was that I was satisfied with what I was making. And that I was always growing in skill, even though what I had, wasn't all that good. Getting readers and likes and even money for my series will always be secondary and never my priority. Just a bonus for my hard work.
also I'm stubborn as hell and I just refuse to quit since I started already.