04听Get Taken On Agents find out about deejays through word of mouth, contacts, being sent mix tapes and through other people.
"Take all the flyers with your name on, any write-ups, any mix CDs and details of any nights you have promoted."
DJ G. Child
Getting a recommendation from a taste maker is the best way forward.
They are literally swamped with talented people wanting to be represented so it can be really hard to get taken on.
Once you are though, the regular bookings and the standard of the events you're being booked to perform at should ensure your profile rises and your reputation quickly spreads.