Re Supplements: You might want to search for a thread about nootropics (smart drugs)from a year or so ago.
On dietary suplements- Recently, a relative of CoQ10 called Idebenone has been researched. I have tried it, adn thought I have not realy decided yet (only been a week) it does seem to be stimulating so I do not take it after noon.
Tried and proven are Phosphatidyl Serine, Fish Oils, (Incl DHA) Choline, Magnesium, BCOmplex, and many others. DMAE (which can raise blood pressure in some is a pretty good one if it is appropriate for you.
There is more to write about- I have to go now so I will continue later.
vitaman