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Avoid defeat
Sounds obvious, right? Well, it's as simple as that.
So long as Tunisia fail to defeat defending champions France in Al-Rayyan, a positive result against Denmark will grant the Socceroos passage through to the last 16.
With France's place in the knockouts already assured, it remains to be seen how strong a lineup Didier Deschamps fields against Tunisia, though history will at least be on Australia's side.
Not since 1971 have Les Bleus fell to their African opposition, having gone unbeaten in the four meetings since, including most recently in 2010.
Denmark, meanwhile, have only faced the Socceroos once in the last decade and that 1-1 draw at the 2018 World Cup is exactly the kind of result Graham Arnold's men will take - outside of victory, which will render a Tunisian result irrelevant.
Control the midfield
The partnership of Aaron Mooy and Jackson Irvine perhaps played its best game yet during the victory over Tunisia, whereby Ellyes Skhiri and Aissa Laidouni failed to keep control of proceedings in midfield.
Mooy in particular displayed a turn of pace and defensive determination often reserved for Irvine which in turn allowed the Australian duo to screen the backline and create opportunities in transition.
A repeat performance - and then some - against the Danish duo of Christian Eriksen and Pierre Emile Hojbjerg will further aid the Socceroos' cause, with whoever holds the middle third most likely to have a direct impact on the game's outcome.
Use the wings
France provided the blueprint for beating Denmark during their 2-1 victory in Ras Abu Aboud: use the wings.
The pace of Kylian Mbappe and Ousmane Dembele routinely exposed Kasper Hjulmand's 3-4-3 formation, and Graham Arnold would be wise to instruct his troops to do the same.
Such an approach will suit the likes of Craig Goodwin and Mathew Leckie, who caused problems for Les Bleus in Australia’s opening match before doing so again against Tunisia.
Leckie and Goodwin have combined for a goal and two assists thus far in Qatar, and have become the key outlets their teammates will turn to in transition.
Wing-backs Joakim Maehle and Rasmus Kristensen are expected to flood forward when De Rod-Hvide attack, and that space in behind is exactly where the Socceroos should look to exploit.
Learn from mistakes
If Australia's opening 4-1 defeat to France taught us anything, it’s that sitting deep for exorbitant amounts of time simply won't work against the best nations, let alone the defending champions.
Mistakes are normal in football; it’s how one responds that makes the difference, and the Socceroos now have the perfect opportunity to use these key learnings against another top 10 team in Denmark.
The Socceroos' 1-0 victory over Tunisia was the perfect response, complete with energy and determination across all areas of the pitch, from all 16 players who featured.
This is the same response Graham Arnold must demand from his men against the Danes. That is, not to sit back if they find themselves in front, nor to shut up shop should a draw prove sufficient.
There is a time for those scenarios, of course, but as the nation learned in Al-Wakrah, they're best left long after the 27th minute.
Believe
Much has been said of Graham Arnold's ability in charge of the national team.
In fact, calls for the 59-year-old's dismissal reached fever pitch prior to the Socceroos' World Cup play-offs in Qatar, which even required Football Australia to reconfirm his position.
Play-off victories over the United Arab Emirates and Peru seemed to silence his detractors as Australia's qualification was confirmed, though that all changed following last week's heavy opening defeat to France.
The pendulum again swung as Mitch Duke sealed the nation's first World Cup win since 2010 against Tunisia, and Arnold had some choice words for his critics at full-time.
"Who cares? They’ve never coached," Arnold said on Saturday. "I haven't seen who is critical but I think some of them have never even been to a World Cup. So I don't listen to them. They have no effect on my life."
For Arnold, it's always been about the players - his players - and the message has always been clear: believe.
"When I got the boys in a circle after the (Tunisia) game, I told them: 'I'm very proud but we have achieved nothing at the moment'," he said.
"We can talk after about a win that hasn't been done for 12 years, but we're here to go as far as we can go."
Time will tell whether that's beyond the group stage, but whether the public believe in him or not, it's fair to say his players definitely do.
