I think it was Edward De Bono who came up with the idea of wearing 'different hats' to think differently. But I am talking of literal hats- some of the hats I have tried are Vietnamese (my favourite), Baseball cap, Mexican Sombrero, Moroccan Red, and some pagdis (headgear) like in Udaipur, Jodhpur (Rajasthani) and a Mysore Peta and Marathi Pheta. Of course, many Golf caps too.
Many of these are immortalised in pics- hopefully I will find them.
