The steps for turning a patch of grass into a garden bed are as follows:
Lay out your plot – this can be curved into any shape that appeals to you. A garden hose can be used to define the shape of your plot.
Dig holes for bushes or trees at this point. If you are planting something that requires an acidic soil (such as blueberries, enhance the hole with coffee grounds. Plant the bushes and trees.
Over this spread compost. Add more leaves and grass clippings.
Top the whole works with a thick layer of rich soil to which has been added compost or well rotted manure. We used potting soil from Bos Sod that was already enhanced with compost and manure. For 100 square feet you will need 1 to 1.5 cubic feet of soil. The rake was used to spread the soil around the plants. Hands are also a tool and be prepared to get dirty.
Water well. Enjoy.