mmm, for me it's one of three things I feel- although usually it's motivation more than not knowing what to draw. But it'll be personal art exploration, like trying new methods for... well... anything; recently coloring has been a topic I turn to in this case. Sometimes I just turn to something familiar be it old or not. Just kinda running the motions, so to speak, reminds me why I like to art in the first place and calms the waters. Failing everything else it'll be some kind of 'need', like a joke in conversation turns into a desire to doodle it up which turns to scanning and yadda yadda.

But I don't think I'v ever really had a moment where I look in the mirror and can say "I have no idea what to do...", and I may just be lucky in that way, who knows.

I like to listen to music that calms me. First, I try to get in a neutral mood. Then I think about what I like to draw, what shapes please me. Then I think of a mood and listen to music of that mood and try to go with the flow.

You must absorb in order to create! When I find myself standing in front a rock hard art or writing block, I read or watch or play something completely new!

On the art front, I like doing requests to get prompts I never would have thought of myself or I watch the 'newest uploads' page on various art sites to kickstart my creative drive!

Well, and this is just completely personal, but when I find I have writer's block, I just completely let go of the thing I'm doing and try to go do something else like play a game or something for a little bit to just totally get my mind all the way off my writing. Kinda like, refreshes my mind a bit, so it feels less cluttered or stressed. Can't say it works for everyone but it works for me.

It varies really. For me honestly I find that like suggested already; requests are good. Also doing one of those art challenges/memes. Something that kinda forces you to experiment and try something you normally don't do or outside your 'safezone'. Shake things up a bit basically.