The entire Do-it-yourself principle is quite exiting: it's encouraging people to take action and not to be dependent on "professionals". Even though this could be the source of a great deal of crap, there is a great deal of creativity involved, in which the final products are freed from the institutionalized methods and standardized ways of "how things should be".
That being said, sometimes non-professionals don't know the technique to get things done. Therefore, a group of graduate students and faculty from the Maryland Institute College of Fine Art got together to compile a book of knowledge to help people that want to do things themselves. Basically: designers tell people what they might want to know about designing and made that into a book: DIY - Design It Yourself.
Quite some ideas of how to do things yourself are to be found on the
Design It Yourself website