Thank you all for your replies!!!
I'm glad that I was alredy aware of some things (like appreciating my family, especially my Mom, because rather soon they won't be with me...; or not get tanned because it will spoil my skin in the future
)
What really never occured to me is Lola's comment that one should remember that his/her kids will be around for a very short time. I'm going to have kids not less than in 7-10 years, but I'll bear this in mind because I always thought that kids would make life nasty for long 18 years.
One more thing that ferociousgoals reminded me of - take advantage of my youth with it's energy. I think I should never forget this while I'm young, I suspect many things will be much more harder to be done when I'm older.
About e-book on human development - I started reading one by Craig (sp?), I just feel it's one of the best encyclopedias on this topic. Probably I'll check Maslow's works - some of our professors at the uni were simply obsessed with his work.
As for science... I don't believe it has become commercial here, in Russia, at least I've never encountered such works, but only genuine researches. As for other countries... don't know if it's overall commercial, for example, I highly appreciate Craig's textbook.