Most of RSS feeds nowadays only include the title and a small abstract of the posts. For this kind of feeds, is there any way to retrieve the full contents on Google Reader? So having to visit the external site to read the post is no longer necessary.
There is at least one Greasemonkey script which can kind of get you there by actually pulling in the post from the website.
Gina Trapani's "Better GReader" Firefox extension includes a number of Greasemonkey scripts to improve the Google Reader experience, including "previews" for partial feeds.
Definitely check out an experiment called Readable Feeds: http://andrewtrusty.appspot.com/readability/
Readable Feeds can filter out ads and other junk from your feeds so that you can concentrate on the content. It can even repair crippled feeds that only show small excerpts instead of the full content, saving you the time and hassle of leaving your feed reader.
Readable Feeds is brand new and there is a good chance it may fail spectacularly on some feeds. Any and all feedback would be appreciated!