*Correction*: If you do bag your leaves, please use paper bags. The leaves will still be composted. Plastic bags damage their equipment.
The DC government has set up their leaf collection schedule. For SE Capitol Hill, for example, leaves will be collected starting November 22nd. For NE Capitol Hill, leaves will be collecting starting November 8th. All you do is rake your leaves into the treebox near your place the Sunday before the first pick up. You can also bag your leaves and put them in the treebox or next to your trash; HOWEVER, the DC government website says that bagged leaves will be disposed in the trash. Therefore, I suggest that you just rake your leaves into the treebox, so that they can be composted. Alternatively, you could bag the leaves and then the Sunday before you could put unbag them, placing them in your treebox. It's great to keep leaves out of the landfills and to make them into useful compost.