Really, this isn't a hard concept to grasp: RSS is not email. You don't need to read everything. You don't need to feel overwhelmed. You don't need to feel guilty. What an RSS reader allows you to do is have a central location to categorize and read updates from all the sites you want to follow, and you get the added benefit of knowing what you've already seen. So what if you have 10000+ unread items across all feeds in your aggregator?