Supplements or Protocols for Mental Focus

Are any supplements or protocols particularly useful for mental focus?
There's a few things I'd really like to do such as create a certain website which I think would be useful to others but I find it hard to focus on the tasks needed to get it done.

nootriment.com/category/nootropics/

human body is a machine with a lot of tubes called arteries, veins, capillaries... all this after 20-30 years in operation end clogged, no blood, no life, no energy, no oxygen, no... = senescence & death, so the taking of the "pill" is the easy part, first is necessary to clean very well all the "body channels" or no supplements can help you... well maybe a little in some moments but overall in every year of your life - and - and -
you have many paths for clean your body, but ALWAYS your mind is the BEST and MOST strong weapon, the rest is for accompanying

shambhalatimes.org/2011/10/20/before-and-after-portraits-from-dathun/