What do I mean by nothing?
Walk away from the project or situation that has you banging your head against the wall and do something completely different. Read a book, take a walk, call a friend, meditate. Do nothing that relates to the situation or task at hand.
A million years ago I had a presentation due and I didn’t have word one on the thing. It was 2pm; I’d promised a first draft by 5. I was practically crying when my husband suggested I go for a walk. I thought he was crazy. Yeah, crazy like a fox.
I went for a walk and wasn’t gone five minutes when suddenly I could see the entire thing: how it was supposed to look and feel, and what it needed to say.
I’ve sworn by this approach ever since. Give it a try.