A tip I gave parents is that you can reuse your children’s brown paper lunch bags as compost liners. Kids can bring home their leftover food waste, and you can use it in the kitchen when preparing dinner and fill it up with scraps and then throw the whole thing into your compost bin, then you are getting your greens and browns at once. Also the brown paper towels used widely used at school is great way to add the carbon-browns to any compost.
For more tips, check out this LA Times Article: The secret to perfect compost? Experts weigh in – latimes.com.