Too bogged down.

So a recent trip and school year made me learn much about my writing. And some of this probably goes back to the benefits of not writing often. However, this week’s question is probably something that all writers should at least have a clue about.

When do you find yourself unable to write, as in either the plots are just not coming to you, or the writing isn’t coming? What do you do then?

For me, I have found that I cannot write when I’m stressed.  Absolutely nothing comes to my mind to write, and even if something does, it comes out like garbage. I also can’t write when I’m really tired (like on a bus trip) because it’s like trying to shove sludge through a straw and nothing comes out.

Anyway, what about any of you?