Some people start with an easy pile, and then move to a bin when they're ready. You can give your pile some structure with chicken wire, snow fencing, or by nailing scrap wood together to make a four-sided box. A pile works great for just leaves and grass clippings, but when you want to incorporate food waste, it's time to use a bin to prevent rodents.
Closed-top bins include turning units, stacking bins, and bins with flip tops. Bins can also be purchased from retail or mail order businesses. Take the time to consider your options and then select a bin or pile to fit your needs.