Well, tutorials definitely do help, but one of the best ways to learn is to experiment. A lot of newcomers don't want to bother, though, because it's time consuming and you can't "get rich quick" that way. But, when you do find the occasionally nugget or two, it will be worth it. I recall reading that Kai Krause (of Kai's Power Tools fame) would spend days messing with the different chanops available, adding here, multiplying there, etc. He came up with some awesome stuff that nobody had ever seen the likes of before. This was probably partly because he experimented and partly because he didn't use any pre-defined or packaged filters!