If you eat dairy, go organic. Organic dairy products have higher levels of scatter-fighting, anti-inflammatory omega-3s. Conventionally raised, factory-farmed dairy has higher levels of scatter-inducing, pro-inflammatory omega-6s. Choose full-fat or low-fat organic Greek yogurt. It's counterintuitive, but high-fat dairy is more likely to keep you slim whereas nonfat versions have been linked to weight gain. Also, most of the omega-3s are found in the fat, and that fat also helps you to absorb brain-boosting vitamins. A daily serving of yogurt significantly reduces anxiety thanks to the probiotics that produce feel-good and stress-relieving neurotransmitters like serotonin, GABA, and acetylcholine.
All nuts are great, but walnut is the Superman or Wonder Woman of nuts due to the sky-high levels of the omega-3s it contains. Like other plant-based sources of omega-3s, it's converted mostly into the "feel good" omega-3 EPA, which helps to improve mood so you get through your busy day with a half-smile on your face (To get enough of the "think better" DHA, choose the wild salmon salad over the grilled chicken for lunch. If you're vegan, take an algae-based DHA supplement.)
Berries are chock-full of anti-inflammatory antioxidants that, unlike other antioxidants, make their way through the blood-brain barrier, which means they protect your most precious organ. Since berries are notoriously pesticide-laden, choose organic varieties. If you're vegan or are sensitive to dairy, a great alternative is a handful of berries paired with kombucha containing chia seeds. The former will give you the probiotics you need, and the latter will give you a hefty dose of omega-3s. Both berries and seeds contain fiber that give you sustainable energy to keep productivity high through your busy day.