Nice, simple tutorial on mounting considerations.

Mounting Display Prints: “Photographers categorize their work with that of an artist or scientist, meaning they see photography as either an art or a science. No matter what school of thought you hold, it should still be your goal to have your prints viewed, appreciated, and most importantly, communicate your message. This is the reason that the salon mount came into use. In photography, this means a display print that is mounted for exhibition.”