If you have a blog, you should also automatically have an RSS feed to go along with it. You will usually find it by typing in your URL (example: www.yourwebsite.com/feed or www.yourwebsite.com/rss). These feeds are easy to read and quite often saved so people can be updated every time you add a new post to your blog. In addition to having the RSS feed icon on your website for people to add to their list, you should also submit your feed to special RSS search engines.
Here is a list of RSS Feed Blog Directories to submit to:
(credit: http://www.toprankblog.com/rss-blog-directories/)
Allforblog
Alltop
Blloggs
Blogarama
Blogadr
BlogCatalog
Blog-collector
Blogs-collection
Blogdire
Blog-directory
Blogdirectorysubmission
Blogdir
BlogDirs
Blogdirectory.ws
Blogflux
Blogfolders
Bloggerhq
Bloggernity
Bloghub
Blogginglist
Bloghints
Bloglines
Bloglisting
Bloggernow
Blogotion
blogswirl
BlogoWogo
Blogrankings
blogratings
BlogRateDirectory
BlogRollCenter
Blogsranker
Blogsrater
Blogsearch
Blogsitelist
Blogsthatfollow
Blogs.urlz
Blogtoplist
blogtopsites
Blogville
Blogz
boxyblogs
Britblog
Buzzerhut
Chordata
Ckalari
Conseillemoi
Crayon
Dmoz
EZE
Ezilon
Feedplex
freshlinkmedia
FuelMyBlog
FyberSearch
Globeofblogs
goblogz
Google
Gozoof
hottestblogs
Icerocket
Info-listings
irankblogs
Loaded Web
LSBlogs
Ontoplist
openblogdirectory
PuppyURL
Readablog
Rateitall
Regator
SmallBusiness.com
Spicypage
Sportsblogs
submitlinkurl
Technorati
Theseoking
TopBlogging
Topsiteswebdirectory
Ubdaily
Weblogs.com
Websandiego
Webworldindex
Wilsdomain
WordPress
Yahoo.com
Zimbo