I've found myself dithering a lot now over whether to just write it, knowing I could try to order it up and fix it while I have a cup of coffee. What worries me is it's making me less likely to just get up and make code.
And also, I like to think with the fingers, that means to write a prototype and get surprised by the technical surprising problems that appear after I wrote half of it.
When all of that fails, I turn on the brain and use pen and paper :)