Checklist is designed to be very simple. To use Checklist:

1. Drag the block into the page – it should be located in the "Forms" section of the Add Block panel.
2. Use the "Add Item" button to add an item to your checklist. Add as many items as you'd like, just give each one a name. 
3. Need to remove or reorder an item? Just hover over the item and you'll see two icons appear to the right. Click and drag the arrows icon to reorder checklist items, or click the minus sign icon to remove the item entirely.
4. Below the checklist itself, you can give the checklist an optional title, and choose access to the checklist. You can choose whether anyone who can view the current page can check the checklist items, only registered users who can view the current page, or only those people with specific edit access to the block.

That's it! Once your checklist is on the page, just use the check boxes. JavaScript takes care of storing the checked items behind the scenes, without even reloading the page.