Edit: Do squats, deadlifts, bench press, and pullups.
There are a million programs to choose from on /r/fitness, but basically just start with something you can do and try to increase weight or reps every session/week/whatever.
There's a small knob by each lens which allows adjustment.
That way I can adjust them for reading a book up close, or adjust them for reading a whiteboard farther away, as needed.
Would still strongly recommend the fixed-focus computer glasses, however. They only do one thing, but they do it extremely well.
Now, you might say, what about the significant downsides for each of these? Well...yes. They are there, and they are fairly well understood.
There is a growing trend in pharmacology to try and get most of the benefits from some substance without most of the downsides. For example, the list of "new" antihistamines is long and growing every day. You know what the best antihistamine is? Benadryl! It just happens to come with a whole host of undesirable side-effects.
The problem, of course, is that for any "new" pharmaceutical, there's no way to be really sure of all the potential downsides until after they've been in use for some time. Take for example: Rofecoxib. Paracetemol (Tylenol) will destroy your liver, and aspirin and ibuprofen will tear up your stomach. Rofecoxib was supposed to bring all the benefits of these NSAIDs without the significant downsides...instead, it caused heart attacks!
So, not really a tip, but more of a caution/word of advice: if you want the best drugs to improve focus, attention, and endurance have a coffee and a cig. If you don't like the impact that has on your health, then keep in mind any alternatives you want to try could have less downsides...or more.
Maybe the best thing would be to get some rest and follow Michael Pollan's wonderful advice: "Eat food, mostly plants, not too much."
If you have health insurance you can ask your doctor for a free Vitamin D blood test.
Now, I'm not a doctor, but my understanding is that most vitamin d can't be absorbed through the intake of pills.
The solution is to expose yourself to 15min sunlight daily, preferably with short sleeves and pants so you have more skin surface to absorb it.
On the plus side, it's cheaper and you get some fresh air!
Get the Headspace app or pick up a book on meditation and get going. Nothing will improve your concentration more. It takes consistent practice every day, but not as much time as you might think. Ten minutes five days a week treats me pretty well.
And get enough natural sunlight. It will help you sleep better. It will improve your mood. If you can't go natural, get a sun lamp.
Beyond that, I would say that most things that aren't melatonin are either not studied adequately enough (Including the problems with withholding negative results in the medicine industry), or too addictive to be of much use (See: nicotine).
Please don't promote communities like this
Scary to think what people just buy off the Internet and ingest!
Edit: I'm not parent commenter btw, just checked the link out to see what it was about
No. The number one piece of advice on the site is to see a GP and endo for monthy blood testing of certain specific markers to ensure that everything is fine.
The reason the community exists is because for many people the local (and usually arbitrary) rules put on transitioning are ridiculous, and even after fulfilling those points the health service makes them wait typically over three years for hormone replacement therapy. Given that HRT is a critical aspect of treatment, and almost completely safe, for many people on /r/transDIY it's a hopeful alternative to ending it early.
(HRT has ridiculous rates of success compared to other contemporary medical treatments: https://twitter.com/GenderCareDrL/status/820672719473770496)
Doesn't taking hormones damage the glands that produce them endogenously?
Magnesium deficiency is becoming more and more common in the US. If you think you might be low, taking 2-3 ZMA 15 minutes before bed can have a dramatic effect on your daily energy levels. Don't eat anything with calcium within 2-3 hours of taking Magnesium.
If you can, put a weight lifting bar near your work station and do a few pullups every time you pass under it. Every time you go to the bathroom, do 10 pushups. Every time you get a cup of coffee or water, do 20. It doesn't seem like so few reps should have much of an effect, but they add up. Keep in mind this is intended to be an addition to, not a replacement for, a regular workout routine.
When you don't take care of your needs (sleep, diet, exercise, hygiene), your habits take over. Sometimes it's circular - someone could have a habit of eating fast food, then feeling unhealthy, and not having the willpower to cook. Or watching porn until late at night, not getting rest, then not being able to stop.
If you can't take care of your needs, another hack would be to build good habits so that you'd be able to perform well even when you're on autopilot.
It's been life changing to combat my back pain, feel tired in the evening, shift around regularly, grab something to drink etc.
Stretching.
Especially the hamstrings and upper body given the long hours on the keyboard.
They can both be combined easily and are also a great fit for hammock driven development.