Centre Mike Tindall believes England will play more adventurously in September's World Cup than in their successful 2003 campaign.
"We didn't play as good rugby as we'd like because we didn't want to make any mistakes," said Tindall of 2003.
"This time we've got so many young players who enjoy running the ball and have fun with it, we're going to want to take teams on and play fast rugby."
England play Wales on Saturday in their first warm-up for this year's event.
After the match at Twickenham, England travel to the Millennium Stadium for a return match against the Welsh on 13 August before playing Ireland on 27 August.
It has been a busy year for Tindall, who wed Zara Phillips in Edinburgh on Saturday.
The Gloucester centre stepped in to captain England during the first four games of the Six Nations earlier this year after injury ruled out regular skipper Lewis Moody.
England scored 12 tries en route to four victories under Tindall's stewardship and he believes it is important to continue to win in style ahead of meeting Argentina on 10 September in Dunedin.
"Our preparations are a little different to 2003, everything has moved on. Our whole game has changed," Tindall added.
"As a team we've been through different patterns where it's changed from just a physical game but now it's all about running and keeping the ball alive and favouring the attack. So they were very different set-ups.
"In 2002 we were lucky to be going through a spell of 16 wins on the bounce going into our warm-up games. Whereas now, we've had good performances but we've also had those little disappointments.
"We've got to put in three performances in these warm-up games and get better and better each time so that when we face Argentina we've got that air of confidence that we can express ourselves."
Moody, who last played for England in a defeat by South Africa in November, returns to face the Welsh in a match that will give manager Martin Johnson a chance to examine the credentials of some of his younger squad members.
While the 34-year-old Joe Worsley, a veteran of the last three World Cups, has been cut from England's training squad, exciting backs Charlie Sharples, 21, and Manu Tuilagi, 20, have stayed on.
"Charlie's pushing all the time to get a place on the plane. We've got a strong back three unit but he's keeping everyone on their toes," said Tindall of his Gloucester team-mate.
"Manu Tuilagi is going to be a special player. He's lacking a little bit of experience but physically and skilfully he's got everything you need."