For those of my readers who were using Google Reader, here are my comments
1) backup your data, read this : https://support.google.com/reader/answer/3028851
2) for the web gui, there is a one-click migration to Feedly : http://feedly.com
3) you can import the OPML (Outline Processor Markup Language) file from Google Takeout into Microsoft Outlook (right click on RSS Feeds –> import OPML).
Maybe you want to forget about RSS and switch to Google+ or Twitter or read orafaq or orana or install your own aggregator on your web server (e.g. tiny rss)Google+