Take a shower if you don't have long.
I recommend walking before taking on a big problem - even if you're not stuck.
A 1h walk means you are unable to code your first solution, by the time you get back you'll be 4 iterations on in your head - you've just saved yourself 2 days.
Are startup people so lazy that they rely only on seat-of-the-pant anecdotal evidences?
Thanks for the suggestion and thanks for backing me up.
That unconscious thought aids creativity is an idea with some history behind it. The only problem I have with the original article is the intentionality that the author seems to claim. Mathematics used to just happen to me when I was thoroughly immersed in problems.