Well, I offset my flights to, from - and indeed in - Australia.
Now, I know that offsetting doesn't actually wipe out the emissions resulting from the flight (hence the name, one might observe). It doesn't get me off the proverbial Carbon Hook, or solve the larger problems of climate change.
The particular scheme, operated by Qantas, and approved by the Australian Government, supports carbon sequestration through tree planting. I know it's a token gesture.
But it is a positive step. It is action, rather than inaction. I did consider the issue. I made a choice. And - most importantly - I took action. That definitely counts for something.
If you need more, see qantas.com/flycarbonneutral.