Some suggest it comes from the ether. Others say from the muse.
But I think we are asking the wrong question. A better one: Have you ever told a funny joke?
Of course, you have. Everyone has! So, if you are capable of telling a funny joke once, you can do it again.
Good ideas (like jokes) come to us all the time. The problem is we don’t know where to put them.
I publish one blog post per day for several years now. Since I have committed to this practice, I am always looking for more content. The ideas come and I know where to put them.
To circle back to the beginning, we first commit to a practice then we will have somewhere to put the ideas to good use.
No practice, no placement.