If it's anxiety in nature (ie: if you find yourself 'talking yourself out of' things you want to draw for one reason or another ) you have to address the issues surrounding the anxiety, and give yourself the space to draw anything you want without being hung up on the perception of it.

these are just examples of how the true source of the burnout means entirely different approaches, which is why self-examining exactly what caused the 'burnout' in the first place is most important. It is far too complex to give full advice in a microblog service.