Concentration is the ability to focus your attention on an activity and silence unrelated thoughts, ideas, feelings and sensations asking for attention.
To protect your nervous system and improve your cardiovascular function fill your diet with foods rich in B vitamins, antioxidants, coenzyme Q10 and Omega - 3 fatty acids. These are: herring, smoked salmon, tuna, mackerel, pesters, mussels, broccoli, spinach and nuts.
Superfood also contains high amounts of these nutrients and some simultaneously provide a strong caffeine boost. Check out the blog post on concentration for more tips.
I like to explore new herbs and superfood. My collection consists of a few core herbs which I use daily. These are renewed and always present. Additionally quarterly I enrich my collection with new additions to try and review.