How do I tear down a wooden shed?

I have a simple wooden shed in my yard that needs to come down. It's about 7 feet high, by 10 feet wide. It has a shingled roof, held up by standard 2x4 wood and plywood. My construction knowledge is limited. Is there any set way I should dismantle this? I ume roof comes off first. Any tips on how to remove the roof? Thanks!