The BBC has a piece about “How to nap successfully at work.” For a short piece, it ranges pretty widely, talking about the various national approaches to napping at work, and providing some useful specific advice about the practice.
The one thing it seems to me that’s not really mentioned but deserves more attention is the power of making napping a collective phenomenon: when it’s something that everyone in an office does (or is allowed to do), that creates an environment and set of expectations that allows people to rest better.