Sometimes you come across an episode of a podcast you want to hear, but you might not want to subscribe to the series as a whole. Latr.fm lets you add individual podcasts episodes to a single feed so you can remember to listen without subscribing. Essentially, it's like Pocket for podcasts.
All you need to do is head to a URL of a specific podcast episode, click the Latr.fm bookmarklet, click on the audio file, then the web app adds it to an RSS feed that you can subscribe to from your podcast player of choice. This way, you can add as many individual episodes of a podcast as you want without subscribing to the full feed.