Keep track of websites to read

So, I found a nice little tool to help me wade through the web called toread (via Lifehacker - one of my favorite "that's a useful tool" sites.) Basically all you do is sign up at toread with your email and then add your own special bookmark to your browser. Whenever I come across a site I don't have time to read I just click my toread bookmark and it gets emailed to me so I can check it out later. (Actually, since I am a Firefox user I have my toread bookmark set up with a keyword, so all I do is Ctrl+L to get my cursor in the address bar and then type "toread", enter and it does its magic.)