Handy. Also works for walking instructions from books so you don’t have to carry the book.

Take photos of maps, to travel light and have backup before a hike

From Roger Martin's The Design of Business. With a little reflection the funnel is pretty trivial. But I do think it’s a useful way to think about things. At what stage is your business? Still tackling a mystery like Xerox Parc, or getting it down to heuristics like Zynga, or refining out an algorithm like McDonalds.

The knowledge funnel

These are the two things I always look out for when setting up for pool, the line and the C. The rest falls into place.

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Set up for pool