How can England get it right next time in Australia?

So the Ashes have gone and the post mortem is well underway.
But rather than just focus on what has gone wrong, what do England need to do to win the Ashes in Australia 4 years from now.
We hear what Joe Root and Michael Vaughan think plus Stephan Shemilt talks to Graeme Swann and Simon Katich who were on opposite sides the last time England won the Ashes in Australia 7 years ago.