That's another reason why I don't plan to take it on a regular basis. Maybe once a week or less because I don't want to build a tolerance.
I just have a lack of focus. Stress has been making it hard for me. So having mental clarity from time to time keeps me positive.
First, make sure you're sleeping well. Second, whens the last time you tried going for a run?
Throw some sneakers on, run 2-3 miles then down 2 liters of luke warm water. The only time I have issues focusing are the days I don't workout. But going for a run is the best drug in the world (aside from lifting... and maybe heroin jk).
Here are the benefits of a running / jogging:
1) Sweat out toxins.
2) Muscles and heart relax.
3) Heart beat slows down and blood pressure drops.
4) Brain / blood floods with oxygen.
5) Brain triggers a protein called BDNF which is like a system reset / clears your mind.
6) Brain triggers a flood of beta-endorphins aka natural opiates.
7) Cortisol, adrenaline and other stress hormones drop.
I can't emphasize enough what running / exercise do for focus, energy, confidence, efficacy, motivation, sense of well being, etc. Don't do it for health or to lose weight. Do it cause you'll be in a good mood, you'll get more shit done and you'll enjoy it.
After I exercise its *impossible* for me not to focus.
Also, when I was younger I use to bang lines of speed before work. I could go to school full time and work 2 jobs. But I couldn't fucking focus at all. Was always in a shitty state of mind. Always irritable, anxious and paranoid. Caffeine isn't much different. It's just way weaker. Gives you a bolt of energy, you become overstimulated and overrespond to stimuli. You might focus for an hour or 2 but after that you just crash and are worse than before. I have a brother who drinks 3 cups of coffee a day. If you talk to him after 5-6pm his brain is fucking mush. He forgets things. His head is all over the place. Then he needs a glass of whine just to relax. After that he's like a zombie. Modafinil is just another stimulant. It fucks with dopamine more subtly than adderal or speed. So people think its better... and technically it is better than taking addys or speed. But like all stimulants it'll eventually make you nervous, agitated, anxious.... it'll wind up making it harder to focus.
Stims also slaughter your appetite which causes blood glucose to drop and that just adds to the "mush". Your brains gonna be like "wtf I need glucose, vitamins, minerals... not dopamine!"
The day after taking mod, watch how hard it is to focus. They can be useful after work if you're going to some party, taking a trip or just wanna clean your house top to bottom. But going for a run 5 days a week will be a lot more effective.
-BB