(Bias Alert: I'm 20)
Forgive me, but this strongly reads like the thoughts of a man who was once twenty many years ago :)
I am always very interested in the advice of my elders, but I have difficulty swallowing your advice. (Secondary Bias Alert: I've already got a preexisting set of rules to follow)
These articles on what I'm missing out on at 20 both seem to carry some deeply held beliefs that emerge as a result of some societal preconceptions about the origin of success and happiness. You stress breadth but you don' seem to put much stock in depth. It is safe to say I have learned everything I know from studying computers very intently. In this century especially, it is entirely possible (perhaps preferable) to understand the many human disciplines by examining them in that context of your own discipline. Very disparate fields coexist in any sufficiently complex system. The intersection between computer science and literature, finance, anthropology, semiotics and a slew of other fine arts, social and hard sciences seems especially apparent to me. I don't think I could fully appreciate (whatever that designation implies) Postmodernism or Bell's Inequalities through any other context. Nontechnical books tell us more about the current cultural climate than any sort of great human truth.
As far as steadfastness on goals - I started working on a NoSQL database for high speed transactions when I was 19, I now make a considerable portion of my living doing support through this open source, entirely altruistic and ultimately exploratory process. I wasn't "sticking to" anything, I was hanging out and having fun and not really thinking about solving any kind of money problem (perhaps this betrays my own naivete). Regardless, I don't think I could have learned Erlang, Mathematics or anything about databases without a very considerable amount of "wandering". I personally can't fathom the idea of sinking 5 years of your life into something that leaves you with some sense of inescapable dread. I can't help but think you've framed 'youth' in a cliched middle-life tone - crossing nostalgic sentiments about bygones days and entirely present-day concerns (kids these days!).
As far as negotiation: I am always very blunt (sometimes to a fault), but pithy negotiation has always struck me as nothing more than an intentional disregard for another human being's dignity. I once worked at a Del Taco when I was 15 and absolutely hated the many people who tried to nickel and dime the drive-through. Negotiation as a sales process is entirely different than dealing with people who work very hard, and whom you choose o pay to provide you with a service.
I don't care much for reminder apps or pomodoro or any of these 'productivity enhancing' apps, not to say you can't benefit from them. I can, however, speak anecdotally to the efficacy of hard physical work and deliberate focus on improving productivity. We let ourselves get away with too much, too often.
I think you don't emphasize compassion for other people enough. It is far too easy to become so enraptured in your own schemes that you forget how valuable it is to be in good accord with others and to have a good name. If we cultivate ourselves with an awareness that's rooted in 'reminders' and success and not human welfare, we won't get far.
~~~ Side Note
I wrote these out many months ago to codify some internal dialog spanning many years on what sort of system of action is the most profitable use of my time. I have imposed these on myself for a very long time with varying (but monotonically increasing!) degrees of success over time. I consider having rules like these to have been a considerable source of permanent, lasting change on myself. Maybe they will be useful to some other young people.
- Stop "collecting" programming languages beyond what is pragmatically useful or is genuinely spiritually/intellectually enlightening.
- Don't hold onto things I no longer need, try to think
critically about if buying something will make me happier.
- Don't take yourself so seriously, but think seriously about the world.
- Never commit myself to action with only partial confidence.
- Do something to detach myself from desire every day
- Try not to prefer anything over another thing
- Never complain
- Don't let myself be guided by either love or lust
- Try hard to judge people only by their skill in their craft and how they treat others, not by their charisma or attractiveness.