Checklists are a non-linear set of unorganised tasks. Checklists should be created by placing [ ] in each row except the one occupied by the checklist's name, once a task is completed an x should be placed in the middle. To create subtasks for a particular task, indent the row so there are 3 dashes (-) for each level of depth in the task tree at that point. A progress indicator at the top or bottom is optional. To volunteer yourself for a task, sign with your username right of it as you see fit.
If you find this unclear or require a visual illustration, an example of how a checklist should be styled is given below;