[Jarred]

This might not be the best solution for everyone but for me it works, and I only recommended this if you have (and been tested for) ADD/ADHD and have no heart disease(s), as it will increase your chance of getting a heart disease

I take Adderall as prescribed by my doctor and it slightly improves my cognitive ability but much more substantially, it enables me to focus. And I focus seemingly more so than other people normally do while on Adderall. I take 10mg of Adderall XR (Time Release in 3 doses). There is a significant period about 8 hours later wherein one will feel fatigued and their brain will feel like mush (Or that's at least how I describe it).

Maybe you should try focusing more and not worrying as much about cognitive ability. I find that if you're excited and focused on something it's crazy what you can come up with.