Since I started eating meat again last year, I almost always keep a package of organic chicken thighs or breasts in my freezer for fresh, quick-to-assemble meals like curried chicken salad, chicken bacon ranch pasta—and this simple chicken soup.
Chicken or vegetable broth concentrate, like Better Than Bouillon brand, is a staple that I like to keep in the fridge for soups, sauces, and any other recipes that require stock. This way, I can use as much or as little as I need, without opening a full box of stock. The broth concentrate paste just gets scooped out of the jar and added to whatever I'm cooking along with water or other liquid. And as a bonus, it dissolves quicker when compared to bouillon cubes. Low sodium and organic varieties are available, too, which I usually try to buy but sometimes they are hard to find in stores.
Other alternatives to the broth concentrate are a good quality organic vegetable or chicken stock (Wegmans house brand is fairly low sodium) or, of course, homemade stock.