Worked to find the right stimulants and antidepressants (fortunately I no longer take antidepressants) and most importantly focus on what I really valued in life which oddly made understanding how to learn more effectively much easier.
I understand there are arguments against ADD / ADHD being "real" ailments, but I can personally attest to being at least 50-70% more creative / productive as an engineer when I'm using stimulants in low-doses and eating right.
I'm not saying that ADD/ADHD aren't a thing (as it happens, I'm pretty on the fence about that), but I just wanted to point out that pretty much everyone will be more productive/creative when using stimulants and eating right.
Most people don't know this, in the US, a doctor can only prescribe medication for therapeutic use. A doctor can't prescribe someone a low dose of stimulants because that person genuinely enjoys using them, but has no medical need.
Thus, I suspect that some doctors will just write down ADD as a diagnosis because someone wants legal access to amphetamines.
Whether there would be benefit in allowing access to amphetamines is an interesting question, but there are definitely stimulants available.
If it can keep the airforce flying planes for 40hours straight it can probably help people learn more and be better educated.
So fast-forward to my 20's and I pretty much had ignored that speed makes me clear, when I have some issues and the doc tells me I have ADD, and wants to put me on meds. I opted to not do it, and just kept on abusing nicotine.
Anyways, in my late 20's I have kids and decide they are not going to have a smoker for a dad, and quit cold turkey and that is where things went to crap. I could not focus on work, could not get stuff done around the house and the worse it got, the further behind I fell and it started to look like depression which is what can happen with ADD when you get overwhelmed by not being able to get started on anything. I went back to the doc, they put me on a low dose Meth Amphetamine and it's night and day. I don't think I could have ever quit nicotine if it where not for ADD meds.
Funny part is, I am not really into speed, the few I took in my 20's I never really liked, I don't do drugs but I am pretty sure if I did, I would be a heroin junkie as the few times I have had to have morphine or other opiates (medically) where quite pleasant. Point being the lack of desire for speed seems to be a common sentiment among those with ADD/ADHD
I can also relate to having to nearly abuse caffeine and energy drinks just to reach a point of relative mental clarity for difficult problem sets or serious programming work before I was able to be professionally diagnosed.
Keep in mind that if you are taking ADD meds and looking to switch meds, some doctors can be pretty funny about Desoxyn, it's an old drug, not many know about it, and some docs see Meth and freak out. That being said, it's no more dangerous of a drug than Adderall is.
I've found personally that switching between the two every 5-6 months seems to be a productive course of action. I have not encountered any need to increase my dose due to building up a dependency.