I used to do the double dig method but have transitioned to multiple layers of cardboard with mulch over the top for ascetics. Did an area 100x30 feet that I planned out with paths and beds. After a wet season the cardboard had smothered all weeds and deteriorated. I planted it out as I got new plants or divided other plants from around the yard. It is still weed free except for seedlings that blow in which are easy to remove.
I only use this method now as I redo old beds. It is easy and less labor intensive and doesn't stir up dormant weed seeds. With the cardboard, mulch, dead weeds and grass underneath it provides organic matter to benefit the soil. You'll get lots of worms. I have only had to remulch the paths since they get a lot of traffic from the dogs and myself. Here are a few photos of the woodland portion. I tend to have very full beds, and most are lined with large sticks to outline paths.
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