1. first of all, you have to use iTunes 4.9 or above. iTunes is free, for mac and windows.
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2. copy this link: http://blog.nonlinearmatters.com/feed (control-click on a mac, right-click on windows, and choose “copy link”)
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3. on itunes menu, go to advanced and choose subscribe to podcast…

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4.on the prompt window, paste (command-V on mac, control-V on windows) the link you copied before and hit ok.

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5. voilá! you subscribed to my podcast, and itunes will automatically download any video, audio or pdf link I put here. easier for you, easier for me.