Pocket (formerly Read It Later) is one of the most popular services that lets you mark web content for later. It's a fantastic application, and I have no complaints - it has a really good Firefox extension, the Android / iOS apps are fantastic, and the syncing works seamlessly.
But I don't need it anymore.
Yesterday, I blogged about how I'm giving Delicious a shot at organizing and archiving all of my favourite content on the web. Delicious has very good support for tags, and it also lets you create an RSS feed of all your public links. Combine the two, and you have a very effective and elegant solution to your read-later problems!