Start from 'my pipes'Yahoo! Pipes makes it really easy to build a mashup of your favorite RSS feeds, even if you're clueless about programming. Anyone can follow this step-by-step guide to see how it's done.
First of all, log in to Yahoo! Pipes and go to the 'my pipes' page.
Click on 'Create a New Pipe' (I've circled it in red on the screenshot).