"Writing is easy. All you do is stare at a blank sheet of paper until drops of blood form on your forehead."
I usually get stuck in "cycles" where I know I'm not making progress, but I'm exploring my interests and seeing what sticks and what doesn't.
I've found forcing myself to a bare minimum has helped. The age-old "write one article a month" type of thing has forced me to find that sense of purpose to sit down and write something. Sometimes it turns out well, sometimes it doesn't. The process and lessons learned have been more important than the (immediate) results.
John Cleese has written and spoken about the creative process. One of the principles he shares is to never make a decision before you have to. In his experience the willingness to be uncomfortable produces consistently more creative work.