I run my mower over them repeatedly and mulch them up as fine as possible and just leave the compost on the lawn. This was recommended to me by the chemlawn, (now trugreen) people many years ago and I never rake anything organic off of my lawn, grass clippings etc. I just run it over about 2-3 times and leave it and I have the greenest lawn in my neighborhood. I see people raking their lawns and gathering leaves and I always wonder why they're taking all the nutrition that comes from the ground and carting it off to a landfill. Leave it and it goes back into the ground and replenishes the soil lots less work too, win/win situation................