No ritual at all except, I research more on the subject I'm working on, pick the scheme and the paint to use - not all paint color are alike (ie: Olive Drab FS34086 or any RLM color) by brand.

Then I start building my subject.

I do have one rule at my bench…. NO MUSIC. I don't need distraction when I'm laser focus on my builds. I don't smoke and hated it growing up with both parents smoke. No drinks or food either since my bench is already cluttered as it is.