Few days back I had written a post for WordPress and Bloggers blog “How to make WordPress and Blogger Post Via e-Mail“, there are two important WordPress settings including this one and the other one is ratings of blog posts and comments that you are not able to handled either during sign-up process or in the setting menu for a blog on WordPress.com. For Self hosting blog all you have to enhance your blog or Website through WordPress Plugins WP-PostRatings.

1. Ratings Settings:

The Ratings Settings are found in a subpanel of the Ratings menu on WordPress Administration
pages. PollDaddy Ratings are available on WordPress.com. This enables you to place ratings on your blog posts, pages, and comments. To get started, look for the Ratings menu in your dashboard.
There is an excellent video tutorial on Rating setting on posts, pages and comments:

Rating Posts:

There are two options to use ratting system whether to use a Five-star rating, or a Nero rating(thumbs up or Thumbs Down).

Rating Pages:

You can extend your pages by this feature and can set the position of ratings above and below each page.

Rating Comments:

You can further extend the ratings options for comments, so visitors can rate one another’s comments.

Read Detail about Ratting.

WordPress Plugin – WP-PostRatings

Adds an AJAX rating system for your WordPress blog’s post/page.
Download | Read more

9 Useful WordPress Poll And Rating Plugins

GD Star Rating A WordPress Rating System

2. Post by Email Settings:

This setting can be very useful or problematic, because smartphone holder are able to download an app for it that
enables them to do at least basic WordPress blog management on the go. Apps are available for the iPhone/iPod touch and for BlackBerry. Search your required apps related to your gadgets on WordPress.com. Keep in mind that These apps do not require that you turned on the Post by Email setting, though you can use an app sometimes and Post by Email other times.
For detail read more: