With great difficulty. I thought it would be as easy as running it through Ozone but it takes a little bit more than that to get your mixes perfect. Once of the problems you run into to is how monitors reveal a lot of detail, you play the same bounced track in an mp3 player with crappy headphones and it wont sound as good as the 2NE1 song next to it. The other problem is loudness. You gotta get your track loud as hell whilst not tripping the compression too much which will squash all the dynamics out and energy. Nearly all tracks in the mixdown will have a compressor, the Master itself will probably have a limiter, you see the problem. Its a balancing act.