Read It Later is a Firefox extension that allows you to save pages of interest to come back to it later. It eliminates cluttering of bookmarks with sites that are merely of a one-time interest. A commenter below (Chris) summed it up very well: “It’s a ’staging area’ for bookmarks.”

With Read It Later, you can create a reading list of interesting links where you can come back to read them at your leisure.

Read It Later features:

• Save pages to a reading list to read when you have time
• Randomly surf through your list or elect specific items
• After reading, bookmark pages on your preferred bookmarking service
• Right-click links to add to your list instead of following each link.

You can download it from the Read It Later website.