1. Remember "the who." They're not just a band, "the who" is also your audience. And if you don't have them in mind every second you're creating printed pieces, you're wasting time. When you put things in print, this is not the time to think about you, it's the time to think about them.
One of my daily blog reads is Signal vs. Noise from the folks behind software producer 37signals. Not only do I use a few of their products (personally and professionally), I also appreciate their perspective as it relates to significant simplicity.