Yep, pick a professionally mastered track that has the same characters as you wish yours to. i.e big thick kick or prominent vocals or big perc. But basically, just pick a song, you would like it to sound like. Every pro producer references as they mix their track, so it usually isn't a concern for them when mastering comes along. They'll jst drag a track out of their reference list. When I am writing a song, I try to model it on another song, or part of another song, its not cheating at all, EVERYONE does it. How are you meant to know where a snare drums sits in a vocal prog track, unless you listen to an avicii track beforehand? etc