Google Reader disappears tomorrow. If you haven’t switched to another RSS reader yet, you should now.
The first step is to download your feeds.
Once you’ve done that, you can import them into a new RSS reader.
My personal choice is Feedly. They make it very easy to automatically import all of your Google Reader feeds. They don’t make it very easy to export your feeds back out though, so you still might want to download your feeds firs.