LOL I'm actually in the process of digging a drainage ditch for our garden! At least it's worthwhile effort, not "dig a hole, then fill it in"... :)

We rented a trencher to dig down a foot for the fencing, but the ground was so wet it was difficult to move it around, and took a lot longer trying to keep boards under the wheels. We barely finished the fence trench, and thus didn't have time to use it to dig the drainage ditch. I'm doing that by hand, with a grub hoe. It's a good workout! :)