An RSS-reader is essentially a bit of software that checks web sites you've specified (and that support it) for updates and gathers them for you automatically, then stores them so you can easily read, sort, filter, and search them. Not only does it grab the updates for you, so you don't have to remember to check sites and yet you get them as soon as they're posted, it keeps track for you of which ones you've read already and highlights the ones you haven't. And that's just the start of what RSS can do.
All this from a small, free, easy program you can have installed and working in five minutes. So what are you waiting for?