Its hard to keep up with the practice. Today was especially hard, these are the days where my chronic illness kicks me hard and I try to keep up. I still was about to get two pages done at the end of day after getting life things out of the way. I know I am getting better little by little.
The advised I could give others is just keep going. Make one drawing when you start and at the end of your practicing, a year or some long period, do the same picture again. I have seen that theme a lot on this website but it will show you how much you have grown. Its hard to see progress unless you look back. I have most if not all my old drawing books since highschool, kind of a pack rat, and I can see the progress just in my ability to see and translate shapes from my minds eye to the paper.