If you are unemployed and supported by family: Create a firm schedule for yourself. Get plenty of sleep and if you are feeling the art groove, work on more pages so that you can start "piling up." If you manage to get at least a month ahead on your uploads, the pressure eases and you can continue at the pace you want.
If you are employed and have limited hours: How much does art itself mean to you? How much does the PROJECT mean to you? If you have no drive to draw and no motivation for the project you're working on, you will find ALL the excuses in the world to NOT DO IT...to put it off and post sporadically.
Set goals for yourself! "I want to finish chapter 4 before summer." "I want to finish act 3 before 2022."
But, most importantly (and everyone hates hearing this) CUT CORNERS!! If you want to complete something and you DON'T have the passionate drive and time established artists do, you HAVE to sacrifice the quality. You do not want to spend a whole hour on a character's bangs (I have been guilty of this) when it would have been a better hour placed into sketching out 4 pages!
My Method of Madness:
1. Revise the story and script.
2. Sketch out thumbnails of how you want those scenes to turn out.
3. Use those thumbnails as rough guides in your actual pages (because who has the time to re-sketch it all when the thumbnail's right there, save some time and just use them.
4. Flesh out the thumbnail sketches (this is the time that if you need references for any specific movement the character is doing, go find it!).
5. If inking is what takes the longest for you, STOP HERE. Ink the next day. Otherwise, ink those scenes.
6. Color/finish up the NEXT day. If you break up your stages, it doesn't feel as burdensome. I know that as an artist you want to see THE FINISHED PRODUCT on the same day, but splitting up a couple of hours from one day to the next makes it so that your body LOVES you...you won't suffer carpal tunnel or arthritis as hard, You might even get more ideas about the backgrounds.
Remember that, unless you have other people helping you ink and color, you CAN'T expect yourself to crank out quality work consistently. Make it as BASIC and SIMPLE as you can at first, and once you've gotten a good rhythm going, THEN you can go back and add details to earlier chapters or toss a bit more flair into current ones. (Examples: The Kao is a well-established artist and sometimes he redraws older comics that he had originally posted in simple black and white!! And the author of YokaiDay began the whole series as chibis and gradually added full-fleshed scenes of gloriousness as they went along!)
Figure out what works best for you. But, ONLY if the project is that important to you.