Every good nu metal band needs a DJ to randomly scratch a record for no reason during the verses of their songs.
First up, get a lot of stuff you'll never use and surround yourself with it.
Source: 1.bp.blogspot.com
Make sure it LOOKS like you're doing a lot of cool DJ stuff though.
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Wicka, wicka.
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Fashion for a nu metal DJ is important.
Source: metalsucks.net