This is really the worst, but I find that if I just sit down and force myself to do it, I always come up with something that I can at very least use as an outline. i write music, so even just banging out a melody or a chord progression and working off of that usually gets me somewhere and inspired. Also digesting outside content of what you are trying to create. Seeing live music always makes me want to bust out my guitar π πΈ good luck!