Food for getting it done

I stumbled onto an interesting piece on foods that help you be more productive. Some of which are:

• Avocados
• Almonds
• Raisins
• Figs
• Olives
• Walnuts
• Carrots
• Strawberries
• Flaxseeds
  

The particular benefits of those and others are at Lifehack.

I wonder if soaking that olive in some gin and dry vermouth increase it's benefit? Also, I wonder just what's the difference between yogurt and yoghurt?