The best way to track an item that you will want to check out in the future is to use the For Later feature.
Clicking the For Later button adds the item to your For Later Shelf, which you can also use to store items you are currently reading or listening to, or have completed. For Later keeps those items in a list you can easily access from the library catalog or the CRRL mobile app. To navigate to the list when logged into your account, click your username in the purple box, and then click For Later Shelf in the option list that appears.
This video tutorial will walk you through the steps: