It's easy. How you mulch makes such a huge difference for on-going weed maintenance.
In this 3 minute film, I show my new weed-free section of garden and contrast it with two other areas mulched differently.... The results speak for themselves even after just five weeks.
No weeds - used compost, newspaper and mulch
Some weeds - used compost and mulch (no newspaper)
With the Spring warmth and rain, the weeds are growing fast and the difference is obvious. The key is the newspaper - but not on the ground as usually described in no-dig garden instructions. I put my newspaper layer on top of the compost and cover it with mulch. I do this because the newspaper:
stops weeds from the soil and compost layer
keeps moisture in the compost layer (dries out more on top of paper)
allows the soil organisms to access the compost more readily
enables roots of plants to go deeper (you make a hold in the paper and plant into compost below)