It's like baiting them in with tunes they love and then introducing them to something new.

I think we all get to a point where we get caught up with a particular sound or band, we just want more and more of it but you eventually begin to pigeon hole yourself to that sound.

It's a bit like turning on the radio for the first time, you bounce around trying to find something until you hear something familiar and then settle. When a song comes on that you don't like, you turn the station.

You eventually block out things you don't want to hear which is really bad for DJs because a large part of your mix should solely be driven by the crowds reaction.

Throwing in that unknown/unreleased track is great because you already have their attention. It comes on and people give it a chance, instead of tuning it out, in the end it benefits everyone.

Seriously though I have a tip or suggestion and this is from personal experience. I use to dj a weekly called 'Britpop', which was a rock night and variety, basically indie rock, classic rock, a lil bit of electronica. Well my second passion of music is rock but I like alot of bands that havent hit the mainstream so alot of the crowd wasnt too familiar with them, but the songs are great! so what I would do was play a song from a familiar band, unfamiliar band, then a familiar band. but the way i would do it is that i would try and pick band that had the same or similiar type of sound. This is way the crowd wold recognized the first song and get hyped and then follow up with an equal yet unknown song, then a familiar one again that would be something they would recognize immediately again. My purpose was to slowly introduce new bands, but by not losing them with song they do not know at all.
I think this can apply to electronic music in the sense that since some songs sample other ones or share similiar elements, you could play the less likely known one then the recognized more commercial version type. if that makes any sense. If you play a new tune that you know is an instant hit, and the crowd is going off, then follow it up with a known banger for a double wham! to the crowd, the only issue there is that you need to follow up with some equally good or do some kind of change up and so that it doesnt seem like that was the best you got, sometimes when you drop your first banger or classic, you cant turn back and you better be equipped with more to follow up, cuz if not you'll like a chump!