DVA is there to help ADF personnel and veterans with medical conditions and injury compensation. You will become familiar with them over time, but I put it here to help you find where to start getting set up.
Once you register you will be eligible for a small, tax exempt payment every fortnight. Many use it to get a coffee every 2nd Thursday but you could:
Transfer it into your ADF Super as a non-concessional contribution. It will increase the compounding effects.
For more information see here.
APOD is the closest thing to defencediscountservice you will find in Australia. There is a subscription fee to sign up but there are savings to be made, you can find more niche markets and support former soldiers who have set up their own businesses.