While I myself follow a pretty extreme 100% vegan diet and wouldn't recommend it to everybody, I think the importance of eating fresh, green, raw vegetables is underestimated. When I feel tired and chew on some spinach or other greens, I immediately feel revitalised. Actually, I eat salads every day, sometimes also mixed with fruit. For example, chicory (which is somewhat bitter in taste) an oranges are a great combination.

I recommend watching some raw foodism videos, even if you don't want to become a hardcore raw foodie (I also eat cooked foods) you'll still get lots of inspiration and knowledge about what might be good for you. Check out David Wolfe and Dr Robert Cassar if you're interested.

Happy eating