Track work
Use Tasks, status, and Scheduled together so island buttons stay useful. This assumes you already have a project.
Put Docs on Tasks
Open the project. On the Tasks tab choose New Task, or right-click an existing Doc and Add to Tasks. Empty lists show No tasks yet.
Pick a status
Open Properties on that Doc. Set status to In Progress or Next if you want it on the island Tasks menu. Complete or Hold takes it off that active list without deleting the Doc.
Give it a date
Still in Properties, set a due date. Island Scheduled then files it under Overdue, Today, Tomorrow, Next Week, or Later. A dot means something is due today or overdue.
Checklists stay in Notes
To-do layout items are for steps on the page. Island Tasks is for Docs. Use both: the Doc is the work; the to-dos are the checklist inside it.