How can I export my sources and feeds (through OPML)?

If you are looking at exporting your feeds, please follow this link:  http://feedly.com/i/opml

Note that the OPML export will only export your feeds and won't be exporting any boards or read later articles. 

If you are interested in backing up your read later articles and any of the articles you save to Boards, you might be interested in the Dropbox integration which does this automatically, or you can also setup an automation via IFTTT of Zapier (See  FAQ article)