Image: Boris Anthony.
Eat more fermented foods. Fermented foods offer probiotics, which help replenish healthful bacteria in our colon (important for many purposes). Whether it's drinking kombucha (a fermented tea), trying out kimchi at a Korean restaurant, making your own sauerkraut, or eating more yoghurt (FYI: there are now almond, soy and coconut-based yoghurt available), fermented foods are a great addition to any diet.
If you're looking to eat a bit healthier, keep fermented foods in mind. They're a very useful component in your diet.