Smashing Magazine has a few helpful RSS tips and tricks for WordPress users out there:

Let's take a look at 10 useful, yet rather unknown RSS-tricks for WordPress. Each section of the article presents a problem, suggests a solution and provides you with an explanation of the solution, so that you can not just solve some of your RSS-related problems but also understand what you are actually doing.

Here's their list:

• Control When Your Posts are Available via RSS
• Redirecting WordPress Feeds to FeedBurner Feeds
• Insert Ads (or Anything Else) in Your RSS Feed
• Format Your Images for Feed Readers
• Provide Your Readers with a Feed for Each Post
• Exclude Categories from Your RSS Feed
• Display Any RSS Feed on Your WordPress Blog
• Use Category-Specific RSS Feeds
• List RSS Feeds by Category
• Get Rid of RSS Feeds the Clean Way