I had tons of firewood that was a bit past its prime and no longer suitable for burning in my fire place. I took this wood and outlined my garden bed. I then filled the outline with compost (this area had been double dug last year following the procedure described in John Jeavon's book
). The wood border serves as a great way to attract beneficial insects and fungi to my garden plants. I eventually added edible pearl oyster mushroom plugs to some of the logs so that I'd have some mushrooms to go with my veggies.