The age-old advice of “eat your vegetables” certainly applies in this case. A diet rich in vegetables is an antioxidant-rich diet. Salads filled with greens are one of the most effective and easiest strategies in making over a diet. The resources here on vegetable antioxidants may serve as a guide to you as well.
Ginger and garlic top the list, crossing over the two categories of vegetable and spice. Each of these foods as benefits far beyond the ORAC value presented here and can be incorporated liberally and inexpensively into the diet. Lemon balm and cilantro cross into the “herb” category as well and are used primarily as seasonings, though clever cooks will use them as a core part of their recipes at times.