Here are the steps on how to do the Link Repost in Facebook.
Step 1: Find the link (eg: Farmville Barn Raising) and right-click on the 'Click here to help'. It will look like this.
Step 2: Click on 'Copy Link Location'. (after you have done Step 1, which is right click on the link.)
Step 3: Go to the top of your wall on FB and type the message you want to tell your friends. (See Orange Arrow named Step 1 in the picture below.) And you will have to click on the Link Icon to bring up the window for you to paste the link you copied earlier (See Yellow Arrow named Step 2 in the picture below).
Step 4: Once you have pasted your link on the field (after clicking on Link Icon), click on 'Attach' to tell Facebook you want the link you just pasted.
It will then now look like this.
Step 5: Click on 'Share' to tell Facebook you are done with the message.
There you are done! :)
Hope this helped you! Share with others this post so they can learn how to repost links too!