It's one of the biggest hurdles for me too. I feel like if I can nail a much more consistent upload rate, my channel would easily double or triple in monthly views.
It ultimately boils down to having a smooth and refined system in place, one that lends itself optimally for a predictable content scheduling and routine. That means you don't spend a single minute more than absolutely needed to edit videos, research new content, write video scripts, think about titles, thumbnail, descriptions and tags, pour over analytics, and all the other things we have to do to grow. I would lie if I said I don't get caught up wasting exorbitant amount of time on a bunch of those activities, way past the point of diminishing returns. Needless to say, proper nutrition and sleeping schedule help tremendously as a foundation to pretty much everything we do in life.
Optimization of everything we do and think about is key to a fluid workflow and content output, because you need to clear your mind of clutter as much as you need time and energy to do what you want and have to do.
Good luck and keep uploading.