If you live in Australia, get the VGW, and pay a bill on a regular basis with the card, maybe a mobile phone bill, or something.
Thought with VA, you lost points after 18 months of inactivity, or is that with QF?
EDIT: Ahh, VA is 36 months.
Better do something, OP...
If you log into ebay via Velocity, you can buy something meaningless, and the points go to your VA account.
But you must log into ebay via Velocity, or you don't get VA points.
OR do a meaningless SC run, 40 mins turn around time seems to be norm, $200 to earn 1000 points, and maybe 20 SC.
If you go overseas, how about using NZ next time, and put your VA # onto the booking.
On the lower fares, you only earn 0.25 points per mile flown. But NZ flights are already so cheap, SYD to AKL can be had for Aud$199 one way some days when there are "specials".