The first step is probably the easiest. Find someone to look up to. First, you need to know your own voice. Record yourself and think about how you sound. How can you manipulate that? The best way to do so is voice mimicry. For starters, find your media. Anything from anime to cartoons to just basic celebrity impressions. I myself usually impersonate anime, as I find it easier myself. Some of the characters I started with were Tristan Taylor, Joey Wheeler, Duke Devlin and Seto Kaiba, all from Yu-Gi-Oh: The Abridged Series
. Since almost every character in that series is voiced by the same man (as seen at the beginning of this instructable), I thought it would give me more range to do different voices without doing to much to strain myself. In the next step, we will discuss methods of altering your voice, without any technology!