Often, it can take a few separate steps to complete the work described in a blueprint. Launchpad lets you track these steps in the "Work items" text box.
It's easy to track the steps, or work items, necessary to complete the blueprint. Using the Work items text box, give a short description of each work item along with its status. For example:
Design the UI: DONE
Test the UI: TODO
Bootstrap the dev environment: POSTPONED
Each work item goes on its own line, followed by a colon and its status.
Each work item can have one of four statuses:
There's more about using work items in the Launchpad help wiki.