Don’t sit and wait for your past inspiration to return. It very well might not. Go out and find it.
You can’t find your passion, your creativity, or your drive by waiting for it to come back.
No, if you’re feeling blocked, I think the thing to do is go out and find it. You have to, truly, fake it till you make it sometimes, if you’re struggling with something you used to do fluently.
Write without expectations. Sing without thought of the concert.