RSSall is the easiest feed creator.

Just install it and it is ready. Go to Components->RSSall and copy the feed links.

Also there are some basic parameters:

Limit results
Limit words
Logo
Show images
Show category

Currently supported:
– Eventlist 1.1x
– Listbingo 1.3x
– Joomla articles
– Virtuemart 1.1x

Spread your articles to your twitter, facebook, myspace etc. account using RSSall and http://dlvr.it/