Creating an RSS feed

So I can’t figure out what the URL of the RSS feed for a WordPress blog is, and I can’t find it anywhere. I have a sneaking suspicion that if I was in any way technically competent, I’d be able to, but sadly I’m not.
It would be very helpful for those of us who only have a “working knowledge” and not an “actual knowledge” of RSS if there was a tutorial somewhere, but till then, can someone gimme a hand?
If it helps, I used to run GreyMatter and had a RSS feed to LiveJournal at http://www.livejournal.com/~polilog/ – getting syndication back to use on that website is my purpose here.