Tom and I construed the idea to satisfy a desire to see the world. We minimalised our possessions, with most sold on ebay to fund our trip or given away.
We researched the ideal items of equipment we would need for a life on the road. When we left we realised soon we still had way more than we needed. Since then we've been gradually getting rid of things that are not essential. The result is that by now we are getting near to carrying an optimal selection of equipment.