Everybody who does creative work has figured out how to deal with their own demons to get their work done. There is no evidence that setting up your easel like Van Gogh makes you paint better. Tactics are idiosyncratic. But strategies are universal, and there are a lot of talented folks who are not succeeding the way they want to because their strategies are broken.
The strategy is simple, I think. The strategy is to have a practice, and what it means to have a practice is to regularly and reliably do the work in a habitual way.
There are many ways you can signify to yourself that you are doing your practice. For example, some people wear a white lab coat or a particular pair of glasses, or always work in a specific place – in doing these things, they are professionalizing their art.