Hi, I'm sorry I'm late! Sometimes what I do is just take a short hiatus, to clear up my mind. Or sometimes, I'll just listen to music. Depending on your mood, you could listen to any genre. Lately, I've been listening to Taylor Swift's latest album, Folklore. I think it helps spark creativity, due to it being relaxing and no longer pop.
Another thing would be going outside. It depends on where you live, but even so, try to look for the most natural-looking place, and you'll be able to relax and then find motivation.
I hope my tips help you! These are what I do to regain motivation, after all!