Turn for speed
Getting air into the heap literally breathes life into it during the winter, boosting populations of organisms so the compost heats up and therefore breaks down more quickly. To turn it, empty out the bin and refill it, turning the sides towards the middle so it composts evenly.
For ultra-fast compost, collect enough waste to fill a bin in one go, then empty and turn it as often as you can manage. If shifting compost by hand sounds too heavy, invest in a tumbling compost bin.