a good spade and some buckets to carry earth/rocks is useful for this. Around me there are lots of old pallets (it's a construction zone) that might even be used-- though lugging could be cumbersome. Anyway, I've been watching them burn all this scrap lumber and keep imagining ways to use it!
"If you can't do something well, you might as well learn to enjoy doing it poorly."
-- from a de-motivational poster, but I find it oddly liberating