"Every outing, particularly if we can make them successful outings, will put a bit of distance between that disappointment and that future," said Deans.
Several Wallabies, including David Pocock, have talked about pain from the World Cup result spurring them on for the next four years.
Barbarians and World Cup-winning coach Graham Henry noted the hunger of the Australians as he signed off his international career with a heavy defeat.
"The Australians have come off a World Cup and they would be disappointed," said Henry.
"So psychologically, they were going to be on the edge to play."
The Wales side is hard to get a read on because of a raft of injury concerns.
There are question marks over the fitness of World Cup stars Jamie Roberts, George North, Rhys Priestland and Leigh Halfpenny.
Mike Phillips, James Hook, Lee Byrne and Andy Powell have all been refused permission by their clubs, while the Welsh will also miss influential lock Alun Wyn Jones (toe injury).
Deans said his players were primed for one final effort for 2011 against a home side determined to send winger Shane Williams out on a winning note.
"They (Wallabies) have had a big year but they have been fantastic in the way they have taken to their work," he said.
"They are conscious now there is a break coming - one big effort (to go)."
Following his man-of-the-match performance last weekend, Australia's Adam Ashley-Cooper must surely have nailed down the fullback spot at the NSW Waratahs for next year's Super Rugby season.
With Kurtley Beale joining the Melbourne Rebels, the former Brumbies player is tipped to start at No.15 ahead of the likes of Lachie Turner and Drew Mitchell.
"Wales are a pretty similar team to the Aussies. They are a young team and an exciting team and like to play with the ball in hand," said Ashley-Cooper.
"They have a lot of exciting backs. It will be a great challenge for us."
