I like to skim through my Facebook newsfeed and flag posts (and sometimes links) I want to read then come back and read that stuff. (I find this is less distracting and I'm less likely to lose an hour down a rat hole.)
If you are referring to links that get posted, there is the Save feature that you can use.
Another option is to click the "Share" link beneath the post, then select "In a private message" then start typing out your Full Facebook name, and you can then send the link to the post as a private message to yourself, that you can check later. Note the "Save" button method that Alex mentioned only works for Link type posts, using the "Share" method should work for any FB post.