The best way to let people know your website has a feed is to use auto-discovery.

All you have to do is add the following line to the section of your web page(s) (if you have an RSS feed):

<link rel="alternate" type="application/rss+xml" title="RSS" href="YOUR-FEED-URL">
or this if you have an Atom feed:
<link rel="alternate" type="application/atom+xml" title="Atom" href="YOUR-FEED-URL">

That's it!

Now, whenever someone visits your site in Awasu, Firefox, or any other program that supports auto-discovery, you will be told that a feed has been found and asked if you want to subscribe to it.