MOTH has a great Instructable for reclaiming fence wood.
Here is a great and simple way to reuse old fence wood.
Cut off the bottoms that have rotted out.
Layout in straight rows or create a pattern such as herringbone on a piece of 1/2″ plywood
Use screws or nails to attach.
Cut shape out using router for circles and complex curves or a saw for straight lines.
Hang on the wall
Don’t over complicate this project, leaving it simple will bring more attention to the use of reclaimed wood and add the minimalist style.