This is a great animated .gif of how to salvage a pie chart. ;)

For UX09, Competency 3, Proficiency (or Question) 4, "I explained how to avoid designing misleading data visualizations," I used this article as a source for part of my answer. It describes 4 tactics that can be used to decieve, or if used, can decieve, so to avoid deception/misinterpretation, avoid using the four mentioned tactics.