Currently learning HTML5, CSS3, LISP, PYTHON, PHP, PERL, Java, MYSQL, VISUAL BASIC, Javascript, Ruby, Ruby on Rails. So far what I did was buy books on all these and I try to read at least one chapter a day. So I imagine I could get through all books in like 6 months or so. That way I'll have a general idea of all of them, for now I know hardly enough to be useful in any one.