Mark Glaser offers 10 excellent ideas for making RSS Really Satisfying Syndication. although he is talking about improving aggregators or news readers, there are a couple of gems in there for publishing RSS feeds
Give more personalization features that let me filter the barrage of reading material in a meaningful way based on what types of information I want
Make adding feeds a snap. If I am visiting a site or blog, I donÃ¢â‚¬â„¢t want to have to hunt around to find its RSS feed link. I want some type of shortcut that will add the pageÃ¢â‚¬â„¢s feed to my reader in as few steps as possible.