Usually I'm doing one of two things: * Trying to completely learn how an application works * Trying to figure out a specific issue or bit of behavior. For cas

Usually I'm doing one of two things: * Trying to completely learn how an application works * Trying to figure out a specific issue or bit of behavior. For case #1, you generally look for an entry point and spread out from there. For case #2, you're mostly concerned with a specific chunk of code, probably related to an error message you're interested in, so you do some quick searching or digging to jump straight down to the relevant spot. This article is a great example of that sort of behavior and thought process: http://www.lihaoyi.com/post/DivingIntoOtherPeoplesCode.html http://www.lihaoyi.com/post/DivingIntoOtherPeoplesCode.html