I didn't get around to trying Modafinil, but I've discovered that pure caffeine and guarana extract work better than coffee for me. I was a heavy coffee drinker

I didn't get around to trying Modafinil, but I've discovered that pure caffeine and guarana extract work better than coffee for me. I was a heavy coffee drinker all my life, but several years ago, it just stopped working as well. There's something in coffee besides caffeine that makes me feel jittery and nervous without feeling more alert after a couple of days of drinking it regularly. Basically, it helps with physically intensive tasks, but doesn't help when I have to sit down and do any kind of mental work anymore. Using 100 mg of caffeine 3x a day, on the other hand, gives me the same effect as coffee once did - I can jump around filled with energy and work at my computer with more energy for longer periods of time. 400 mg of guarana extract (~80 mg caffeine) makes me more alert without the physical tension or jitters - if anyone has "coffee fatigue", as I call it, try caffeine pills or guarana extract (but not in high dosages!). I've also found L-carnitine to augment caffeine in physical tasks, and taking 400mg of guarana extract with ~200mg of rhodiola rosea and 50mg of L-theanine lets me work and then sleep pretty well, like I never took caffeine in the first place. YMMV, but it's definitely fascinating to see how we can alter our bodies with psychoactives (obviously, you take a risk, so you have to understand that and doing proper research before using anything). I still want to try Modafinil, but just can't get my hands on it right now...