4-5 years ago I had the same problem, I even fell asleep in front of the computer at work! My solution is really simple: huge dose of vitamin. I use "Scitec Mul

4-5 years ago I had the same problem, I even fell asleep in front of the computer at work! My solution is really simple: huge dose of vitamin. I use "Scitec Multi Pro Plus" as my daily vitamin since then, and it works like a charm.