Most composting is done in the spring and summer months.  The reason is that heat is 
such an important element to the process.  Even though the compost process itself 
generates heat, the warmth from the weather certainly helps everything along.  
Most composts goes dormant in the winter months and start-up again with the spring 
thaw and warmer temperatures.  But if you live in a milder climate that does not get harsh 
winters, there is a way to continue to compost during the winter months.
You can create an insulated compost bin.  Using a plastic garbage can dig a hole big and 
deep enough to put at least six inches of the can underground.  Use a natural insulating 
material such as straw and pack it around the base and up the sides of the can.  Continue 
to compost as you would at any other time of the year.
Even though this method will still work in the winter months, the speed at which the 
material will decompose will still be slowed down.  Winter composting will allow you to 
continue recycling your kitchen scraps throughout the colder months and you may even 
have compost at the beginning of spring to use in your garden.
The spring and fall are the best times to collect leaves to start a new compost bin.  In the 
spring, the leaves you collect have already started to decompose as they stayed wet and 
insulated throughout the winter.  It doesnt matter though if you collect your leaves in 
either season  they are the perfect base for a new compost pile.  If you are using dry 
leaves from the fall, consider putting them through a chipper of some kind.  If they are 
smaller and already cut up it will aid in the whole composting system.