It seems like the tide at times. Washing in with all sorts of creativity and washing out to leave you wrung out and feeling impotent. It emulates life.
Working a job that requires you to clock in keeps you on schedule. Working as an artist in your own studio needs to be that way too. Even if you have waited to retire from public work to take on this new job you need to put your time in with the paper.
Is every drawing and painting going to be wonderful? Perhaps, but it has not been in my experience. Every drawing and painting has, however been a learning experience. No paper or paint is wasted when you have drawn or painted something. Even it only shows you what you do not want to do next time. You will learn something. So go sharpen your pencil. Wash your brushes. Put out some fresh paint and put in an hour or two. You can't sit and wait for that fickle mood to hit!