Ask HN: Posts/sites about breaking mental conventions

I seem to remember a particular blog post I may have found here which, as an exercise in thinking outside the box, outlined a number of things one can do given the resources that we typically mentally confine to a particular situation. For example, you can talk to a lot of political figures or famous people for whatever reason. Their contact details may well be public - just talk to them! Anyhow, I'd like to explore this topic a little further but finding it difficult to search on. Any ideas? Thanks :)