There are days when the creative juices just aren't flowing, no matter how hard you try to squeeze.
When that happens, and I know that it's not because I'm tired, either mentally or physically, I have to switch it up.
I go into input mode, reading, watching interesting videos about topics I'm not familiar with, following conversations online, etc.
And it's very easy to get stuck in that mode, so I have to consciously check every now and then if I'm ready to create again.
And then, it's back to coming up with more new things.