https://www.youtube.com/watch?v=n0wvvQ-050U While I don't have a lawnmower (or a lawn), I use a Worx leaf shredder to store my leaves for winter- this cover material/carbon source is crucial for extending composting efforts through the colder months. While shredding leaves isn't required, it makes the composting process and the finished results ten times better- seriously!
https://www.youtube.com/watch?v=vgdeu39N_Pw Carbon to nitrogen imbalances... MIGardener weighs in. 3 parts carbon to 5 parts nitrogen...
https://www.youtube.com/watch?v=zypyLKtSOag I just replaced all the potting soil in my plants that I brought indoors for the colder months... what to do with it? I like to simply add it to my compost pile- it will "cure" in spring, and the potting soil helps fluff it up and gives it another use. I love how bare-bones his compost bin (frame?) is.