The mess of moving

With our lifestyle moving to another country every few years, it would be wise if we would stick to a minimum amount of stuff. But we don't. With the stuff we have we better promis each other never to move again. We have enough books to fill a 20 foot container. The house we rent in Sydney is not small but it's impossible to fit everything in. This morning, five weeks after we moved in, I again had to spent time on emptying more boxes and deciding what to do with all the things we don't really use but we may use one day in the future. Any suggestions?

This is what our hallway looked like a few weeks ago. I'm happy this mess is gone but other areas in our house like the garage, still need a lot of attention.