if you wanna develop fast twitch fibers you need to do two things:
1)read some articles(scientific) about fast twitch fibers so you actually know what the hell they are. a lot ppl talk about them, but don't know a lot about the physiology of muscles. go to pubmed for articles...
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2)after reading at least 3 articles you should understand them enough to think of exercises that use fast twitch fibers. do those exercises.
i'm a believer in educating yourself and then making decisions, don't take some websites advice... like the above poster said, some of them are shady and ppl can get hurt doing exercises incorrectly.