Lots of folks want to build a shed and have asked for plans. Here is a set courtesy the Makah nation here in WA and posted by the EPA. They get a ton of rain out on the coast so a wood shed is almost mandatory there. Actually it should be everywhere. Dry wood rules.
(broken link removed to http://www.epa.gov/burnwise/pdfs/WoodShedDiagram.pdf)
(broken link removed to http://www.epa.gov/burnwise/pdfs/WoodShedDiagram.pdf)