If you live in Brisbane and you would like to make some extra tax free money doing focus groups the Chitchat Research is well worth joining. I get an invite about once per fortnight to a focus group and the pay is usually in the order of $80 for a 1.5 hour focus group session.

Most of the time they invite you to attend group discussions at specified locations.They might last 1-2hrs. Depending on the length you could earn about $80-100 per discussion. The only drawback is that the discussion location may be a a bit far from where you are.

Approximate cost: $Travelling costs to the discussion locations