DIY cushions for patio furniture. I didn't have old cushions to cover so I used layers of cheap bed padding foam wrapped in batting. Look here for how to do boxed corners that are not covered well craftapple.
This idea of creating upcycled wood pallets garden furniture requires a little bit of time and effort because the pallets need to be joined on proper distance. The pallets are painted for this project (Diy Furniture Crates)