1. Coffee:  Boosts short-term memory; improves attention and problem-solving skills; slows down the aging process.

2. Blueberries. Improves thinking, and helps with long-term memory. Also, the antioxidants found in blueberries are believed to protect the brain from free-radical damage - and thus reduce your risk of developing Alzheimer’s and Parkinson’s diseases.

3. Salmon or mackerel: Speeds up, or increases, your thinking power. Omega-3 fatty acids (found in these fish) are a primary building block of brain tissue. They also contain niacin which helps to slow down the rate of cognitive decline.

4. Low-fat yogurt or mixed nuts: Helps you to relax. Specifically, these 2 foods significantly reduce the levels of stress hormones in the blood.

5. Leafy green salads: Improve your mood and increase subjective happiness. These foods are a great source of B vitamins - which are important for manufacturing feel-good hormones (serotonin, dopamine, and norepinephrine.) They also protect against irritability and depression.

6. Flaxseeds: Helps us process information; sharpens the senses; heightens our experience of pleasure.