Distracting non-rabbit holes? Try some of the following - for ~1 to 2 minutes:

Focus all your attention on feeling what one small part of your body is experiencing.
Try to count how many distinct sounds you can hear.
Spend a moment observing things you can see around you.
Touch something in your environment. How cool is it? What is its texture?
Can you smell anything? Can you still taste the last thing you ate/drank?
Get moving: go for a walk. Do some pushups.

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