I'm also surprised at how little I've had to do! I mean, you just plant the seeds and *BAM!* you have a garden!
I did do quite a bit in the beginning, I guess. Before I even planted anything. I laid down newspaper last fall where I wanted my garden to be and when spring came I tilled and dug out all of the sod. That was a bit of work, but I actually enjoyed it. :)
Whoever said playing in the dirt is therapeutic may have been on to something. :)