Which OTC drug?

I am very stuck on what to pick. I have narrowed down to a few choices. You do not have to help, but I would appreciate it.

http://www.amazon.com/Speed-Natural...p/B00J302UY2/ref=cm_cr_pr_product_top?ie=UTF8

http://www.amazon.com/Now-Foods-5-HTP-120-0-Vcaps/dp/B0062S7AVQ/ref=cm_cr_pr_product_top?ie=UTF8

http://www.amazon.com/Source-Natura...TF8&qid=1429499843&sr=8-1&keywords=tryptophan

http://www.amazon.com/Nootropic-Sup...TF8&qid=1429574669&sr=8-3&keywords=nootropics

http://www.amazon.com/FOCUS-Exceler...TF8&qid=1429574669&sr=8-1&keywords=nootropics

http://www.amazon.com/Neuro-Clarity...&qid=1429578517&sr=8-1&keywords=neuro+clarity

I wouldn't be taking them daily, just when I am out of it.
I would like to increase my down mood and my focus/energy.

Honestly, I use " ultra mega greens men's sport" from gnc. It's veggie pills that enhance energy and boost daily performance. And they also are great for your skin. And if you work out you can feel the difference after a week. Maybe you should check those out