That's the best way to work out where most of your rubbish is coming from.

Veteran environmentalist Kate Beveridge has been reducing her use of plastic for years and she's taking part in Plastic Free July again this month. She says a rubbish audit is the easiest way to work out what plastics a household is using.

Once you know that it's time to look for plastic-free alternatives.

For example, households that buy a lot of plastic water bottles could purchase a reusable drink bottle for each family member.

Or, those who have many biscuit wrappers could consider making the biscuits from scratch.

"Maybe using single-use coffee cups is something you do every day, or most days. You could buy a keep cup or even make a commitment to make your coffee at home in a mug," Ms Beveridge said.

The Anambah farmer suggests participants make small changes first and gradually look for plastic-free alternatives in every part of the house.

"Be gentle on yourself. Start small and build from there. Don't become overwhelmed and feel you have to do everything at once," she said.

"Every piece of plastic you don't use is making a difference to our environment. We say we throw things away but there is no 'away'. There is no land called away where it all goes. Our rubbish goes into landfill or overseas for another country to deal with.

"This initiative is giving people back their power and encouraging them to no longer contribute to plastic waste and to make sustainable decisions for themselves."

Click here to follow Ms Beveridge's journey.

You'll find more inspiration at Plastic Free July.