Shed Plans - great idea to shelter wood and tools from the direct rain (though dont store wood up against the house as it can harbor termites) - Now You Can Build ANY Shed In A Weekend Even If You've Zero Woodworking Experience!
Reuse an old tree to make a log pathway in your garden. Good use of "yard" trees and other wood that can't be milled; works much better in climates without termites. Good drainage under the log rounds will make the path last longer.
Nicer than a shade sail over the pool? This is a good summer shade idea. Clip on in the summer, clip off in winter or bad weather. Could run between two permanent shade structures, or between two parts of the house.