I have a specific tic when I'm getting ready to start writing something.
The blank page is a bit intimidating, so I need to psych myself up and get a bit of momentum.
What I do is go get a glass of water.
The minute or so of walking and not talking lets the ideas bounce around in my head, and I invariably discover a hook or frame that I like.
Once I have it, I feel anxious: I just can't wait to capture it on paper so it doesn't fly away.
So when I sit down, I pounce on capturing it in writing, easing me into the flow state, never having to stare at a blank page.