You level up by posting more. Not quite sure how many there are though... Cairenne or Dolby could tell ya.
(edit: spamming and/or trolling are not encouraged to level up your post count)
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh