Know what you mean, having a that feeling too for the second time this year. The only thing that helps me to get rid of that 'block' is going outside, without camera or anything else. No screen-staring for at least a week. Just looking at things, people, the sky, whatever gives me new energy. And when I've seen enough the ideas start coming. :) Especially with my design work I just need to get away from the screen as much as possible, cause it really does make your brain become incredibly passive. Doodling on paper and working out designs on paper alone is the only solution.