Not all websites/blogs have RSS feeds, but if they do, its easy to find the RSS Feed URL of those sites.
If you want to do this through browser, press CTRL+U to view source, then CTRL+F to open find window and then just type in rss. RSS Feed url should appear immediately.
<link rel=”alternate” type=”application/rss+xml” title=”Irfan Moosani » Feed” href=”http://irfan.moosani.net/feed/” />
Then the url given in the “href” is the URL for the RSS Feed. In the above example, it would be: