Wood pallets as fencing - Set them up nicely and add a dash of paint. This could work. (Its not exactly furniture, but seeing as all my other furniture so far is made from either pallets or crates, I thought it fit in well)
23 DIY Stepping Stones to Brighten Any Garden Walk
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.
A garden path enhances any backyard. Learn about design factors, limitations and installation techniques for gravel, stone, brick and pavers, along with attractive edging options. Planning a Backyard Path: Gravel Paths