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This book is the response to many of those problems: it clearly explains the differences between various RSS dialects (0.91, 0.92, 1.0 and 2.0), their history, where you can find interesting feeds, how you can contribute to the quality of feed and so on.

The book even gently introduce the reader to some complex concepts as XML (if someone has never seen it, it could be confusing) and RDF (well, this one could be confusing even if you're used to!).

If you, or your company, are planning to publish your news, catalogues, services or whatever else, consider to use RSS as tool and consider to use this book as reference.