I'm not really sure you read my top level comment. The problem I have is that I have chronic issues focusing. I tried a lot of different things before I just decided to regularly use nicotine, including, but not limited too:
Outcome: I was significantly more organized, but it terms of actually being able to focus on the task at hand there was little progress. I actually still use some of what I learned in this in my day to day.
Outcome: This lasted a little over a month and I stopped as it became pretty obvious it wasn't helping. My ability to comprehend the material was fine, so there wasn't much this could accomplish.
Outcome: I was prescribed each drug for two months each. Adderal seemed to have no effect at all even at moderate doses. Ritalin did help with focus, but at the cost of inducing some pretty intense anxiety and cardiovascular strain. The cost were most definitely outweighing the benefits.
Outcome: This was a last ditch effort by my doctor, who was running out of ideas at this point. I was prescribed Wellbutrin, which is chemically similar to stimulants, for three months. After about a month it took effect. I had significantly more energy, but this seemed to only aggravate my attention problems.
At this point the physicians and psychologists I was working with were more or less out of ideas. It was at this point I just started looking for some sort of alternative and found that people with ADHD found smoking helped. I started a nicotine vaporizer and, without exaggeration, immediate results. I got significantly more focus than what I saw on more traditionally used stimulants without the anxiety, increase in blood pressure, or outrageous medical bills. The head splitting headaches I got from trying to focus for more than 30 minutes at a time were gone, and it made being productive exponentially easier.
Keep in mind, I'm not some teenager that doesn't know how to manage my time or study. I've been living independently since I was 17 and have been juggling working 30 works a week along with university for the past three years. This isn't a matter of discipline or work ethic, there is clearly something either neurologically or personality based problem that is fairly deep set.
If you have any other that I or the doctors I consulted haven't come up with that would have the same effect, I would be more than happy to hear them.