1). download live mixes by artists that spin genres you're interested in.
2). get a tracklisting.
3). listen out for songs that do that special something for you, find out what the track is. you know, those tracks that when you hear you sort-of 'buzz' / get excited
4). when you have the track name look for other tracks by that artist, or any remixes they have done. the remixes they have done are usually by people that play the same genre of music or what-not (obviously not always), so check out their tracks and remixes too.
5). tune in to one of the www.bbc1.co.uk/radio1 radio shows once a week (or any of the hundreds there are) to hear all the latest tunes and general chit-chat about electronic music etc
i suggest you play the music you like playing, it's just about how to actually discover said (or heard hehehehehe) music