Check this link out, its amazing. I am reading a book by him called how to make a good brian great. Its really informitive. Allthough most if it isn't new to me, he impressed me with his will for using spect imaging (which nobody does because of cost and training required) and putting the pieces together.
http://brainplace.com/bp/articles.php?articleID=10
I have also been taking Rhodiola Rosea and L-Tyrosine
the pycnogenol helped a little bit but over a period of time, like the meditation. The L-Tyrosine and Rhodiola Rosea have shown me improvements right after taking them. Works for me.
http://www.herbalgram.org/herbalgram...iew.asp?a=2333