The GAAP Navigator in the Financial Accounting Resource Center is where I usually start. Having it all in one place – a practical, plain-English summary of a topic, with the ability to drill down into specifics – is a big help. When I need to understand a topic in even greater detail, the Portfolios give me real-world examples of things to consider. And the Daily email summaries of whatever news is happening are very handy in helping me keep up with what's relevant to me.