If you are a blogger, more often than not, you are using WordPress as the blog authoring tool. Below is a recommended ping list for WordPress blogs. This list is from my personal experience as a blogger for almost 5 years now.

For the uninitiated, ping is an XML-RPC-based push mechanism by which a weblog notifies a server that its content has been updated. Blog authoring tools like WordPress automatically ping one or more servers each time the blogger creates a new post or updates an old one. So every time you make a new blog post, these services will be notified about your blog post increasing your online exposure.

Updating your ping list is easy. Go to Settings in the Dashboard panel and go to the Writing option.

Scroll down till the end and copy and paste the following ping list into the Update Services box as shown in the screenshot below.

http://api.moreover.com/RPC2
http://bblog.com/ping.php
http://blogsearch.google.com/ping/RPC2
http://ping.weblogalot.com/rpc.php
http://ping.feedburner.com
http://ping.syndic8.com/xmlrpc.php
http://ping.bloggers.jp/rpc/
http://rpc.pingomatic.com/
http://rpc.weblogs.com/RPC2
http://rpc.technorati.com/rpc/ping
http://rpc.pingomatic.com
http://topicexchange.com/RPC2
http://www.blogpeople.net/servlet/weblogUpdates
http://xping.pubsub.com/ping

WordPress will update all the services everytime you update a post or publish a new blog post. Alternately, you can use the Smart Update Pinger plugin which will ping these services only if you publish a new post and not when you edit or update an existing one. The Smart Update Pinger plugin has an advantage – you can check ‘smart-update-pinger.log‘ file in your ‘wp-content’ folder and see if any services refuse a ping request from your site. If that happens, then you can simply remove that service from your list!