More doesn’t always equal better. Instead of copying and pasting a long list of URLs to update each time you publish an entry to the blog, you should choose the websites carefully and make sure they are in alignment with the topic of your website.
Some update services specialize in popular news, others work with science related websites, some are in a completely different language. Each will have their own guidelines on which blogs should update them and how.
You can find some general update services that you can notify each time you update your blog. Be careful not to spam them, only notify them whenever you publish new content to your blog, otherwise your blog be permanently banned.
Some update services require you to sign up before you can submit your blog and notify them of updates, they include:
For a longer list of update services, including a number of update services for different countries, visit Elliot Back’s Update Service list.