Here's some real advice: find out what is blocking you and slowly move to remove it from your path. First; It is not a "mental block". It is a tangible, existing stopper, you are just not focused enough to figure out what it is. It may be an academic topic you need to study, allocation of time, reading a guide, getting a permission or something as simple as getting feedback. If feedback is not available, try to find existing precedents to inspire you.