I have a t-shirt that says: Writers Block: When your imaginary friends won't talk to you. And that is exactly what happens when I get writer's block. They aren't playing, and when that happens, it is frustrating. When I get writer's block, I usually wake up in the middle of the night when it comes back and then I can't sleep. That's no fun, either.
But in all actuality, I don't get writer's block all that often. I think the main reason is because I'm a plotter, not a pantser so by the time I get to writing the book, I have everything planned out. I know what's going to happen and I just write.
There are times, however, when I'm writing and I get stumped on how I want the scene to play out. It's those times when I get busy with other things. Writing my blogs, start my next monthly newsletter, write ideas for social media posts. Sometimes I consult my handy-dandy internet finds or books on writing to see if I can motivate myself enough to continue.
One thing I dislike doing that some authors do is skipping around in writing. I know my characters pretty well before I write, but sometimes I learn things about them while writing, so I write in order of how the book will go even if I know what happens in future scenes. Doing it this way, I find things within my characters that may alter future scenes and how they play out.
Many people sputter they can never write a book, and some people commend me and other authors for the work we put into our stories. True, there is a lot more than a person thinks that go into a book and you have to make sure everything plays out well. Writer's block, in a way, helps me with that because it gives me a pause and I can focus on something else. Even if it's just for a short time.