Choose a folder to store the related links resource file. They should usually be stored in a folder named "related-links" which should be in a folder named "blocks" under the top level of the folders you are in. For example, an external links file for the Psychology Department would go in a folder: psychology/blocks/related-links
Create a resource file in the folder you chose by selecting New->Blocks->Resources
Type in a name for System Name that is all lower case letters and use dashes, instead of spaces.
For the Heading, type in "Related Links".
Type in a name for each link you want and copy in the url address.
You can add more links by clicking the plus sign button and remove them by clicking the minus sign button.
You can also move the order of your links up or down by clicking the black triangles.
Click on the Submit button when you are done creating your links.
The links should be visible in the lower left corner of all pages within the parent folder you used to house the block.
Note any time you edit, create, or delete a related link you should publish your site. Related links affect other pages and all pages they affect should be published.