When I master someone's track, I always tell them to mix like it's not gonna be mastered. Then when it get's to me, it's like polishing silver, and it provides the best possible product for them. Makes them look stellar and I feel good about my work. When I make my own tracks, I like to mix it exactly as I'd like the master to sound. So that way when I master or ask someone else to master it, all they really need is a compressor, and maybe a slight bit of EQ'ing if any, and, as a personal preference, some light saturation (Multiband, on Ozone it's called "exciter") as well. Of course stereo widening, limiting, and making sure the track sounds consistent is a good thing. I also like more energy, so Making the compressor as punchy as possible without making it sound too jumpy is great. Saturation and compression are the two most valuable things for making the track energetic, at least from my experience. Faking dynamics with a compressor is always a good trick. You can also fake dynamics with a saturator, although that's more left up to the effect rather than the actual pump or punch of the compression.