Holy pharmaceutical engineering Batman! To be clear, I was joking about the adderall. I think the dangers of caffeine are a bit overstated (full disclosure: I drink 40 ounces of coffee every day). And if you are deficient in omega-3's you are malnourished, correct your diet (stinky fish, nuts, seeds, bugs if you have to). But the meditation is something you should consider. Having 100% mental focus is impossible if you are distracted, and the ability to think of nothing is a complimentary skill to thinking of only one thing for an extended period of time. And like anything else, it just takes practice.