Here you go - lots of discussions here on best mulches for the vegetable garden.

My personal preference is old hay and straw.

Dave

Here is a link that might be useful: Best mulches for the vegetable garden discussions

Use whatever you've got on hand or is easy to find. Grass clippings, leaves, straw, hay, pine needles, etc. There are many options. Some people use wood chips but I wouldn't recommend them unless you are doing a no-till garden (others will probably disagree with me).

Rodney