To activate it, you need to go to user settings, and under Frontpage Nodelet, check the box next to Personal Nodelet if not already checked. Also check "Use Frontpage Nodelet's Everywhere" at the bottom of that section.

Submit and reload; you should see all the nodelets on the right hand side of the browser. Go to any node that you wish to keep track of, and you'll see that at the bottom of the box for "Personal Nodelet" is a simple "add (node title)" line. Click this, and that node is dropped into the personal nodelet. Then, anywhere you are in PM, you have access to whatever nodes are stored there. (I usually keep thinks like Super Search and Message Inbox in there as well for quick reference). If you want to remove a node, head back to user settings, and at the bottom of the page is a list of nodes in the personal nodelet, which you can click on the checkboxes to remove.

Or optionally, you can always create the links on your home node.