i hunt on beatport every few days and spend a few hours in the evening listening to new steez.
also, tunes from mates. i have garnered a few from chaos recently while listening to his radio show. he tends to play a lot deeper than i do so he is extremely helpful in finding lush beats.
word of mouth, to an extent. i have a few mates that i trust implicitly, if they say something is good i will immediately take notice and go have a listen. however, i quite like finding tracks and producers that no one else knows about. ill keep a lid on them for a while, its nice to have something to yourself for a bit.
also, i am a self confessed trainspotter. if i hear something i like, its not long till i know what it is.