Costco
This is perhaps one of my favorite stores in all of Chula Vista, if not all of the world. The prices are very good and you can find plenty of what you need in bulk. This is perfect for entertaining, school events, or even if you are just smart about buying groceries for your family or organization. Everything is organized in a comprehensible manner, and there are always people around stocking things who can help. Also, they occasionally have really good deals on DVDs, particularly seasons of television shows and movies in trilogies or boxed sets, so keep an eye out and you might find something you'll like.