A few months ago I made a flowchart to make it easier for people to understand the disguise rules. I have since made a NEW, IMPROVED version (link to full size chart here).
If you've seen the other chart, none of the basic content has changed; the rules are still the same. However, I wanted to try to differentiate between the mechanics of a single player breaking a disguise mechanically versus roleplay that might lead to a disguise being debunked, which this chart does better.