My personal tip is related to one in the article: Instead of a full spectrum LED, use a near-infrared (Eg 850nm) light and shine it on your forehead for 5-10 minutes. The concentration gains I get from this are substantial, and they last up to 2 days. Security camera IR lights with 850nm can be had for $30 or so at Amazon. The name of the mechanism by which this works is called photobiomodulation, and there’s thousands of papers on how it improves body function.
Seeing a "mercola.com" domain show up in the first page of google results for this phenomenon just increased the difficulty of parsing whether or not the effect is legit or not by an order of magnitude.
