Although people can subscribe to blogs via email using programs like Feedblitz, many people read blogs and other news with something called a feed reader.
Frank Gruber published a review of nine feed readers:
* Attensa Online
* Google Reader
* News Alloy
* NewsGator Online
* Pluck Web Edition
in his March 30, 2006 Tech Crunch post, The State of Online Feed Readers that you might want to read to help you choose.
I'm a Bloglines fan myself. To use Bloglines, just set up an account and when you see a blog that you want to add to your Bloglines account, go to your Bloglines account and click on the tab that says, My Feeds. Click on the word Add. You will be prompted to enter the URL of the blog that you want to subscribe to. Click on subscribe. You may be asked to pick which feed for the blog you want to subscribe to. I always pick the one with the most subscribers.
Even easier, if you go to My Feeds and click on Add, you will see a link to add an "Easy Subscribe Button" above the box where you enter the blog's URL. Click on it. You will see directions to install a link to Bloglines on the toolbar of whatever web browser you use (Internet Explorer, Firefox, Safari, etc.). Once that button is installed on your toolbar, if you are reading a blog that you want to add to your Bloglines account, all you have to do is click on the link in your toolbar and it will automatically subscribe you.