Here's your list of current tasks.
Add your tasks, optionally tag them using square brackets, optionally flag them as high priority with the switch.
Tick 'em off when they're done. On the menu you have the option to sort done tasks by their creation date if that's more useful. By default they're sorted by their completion date.
They're your tasks, export them if you want. You can also import CSV in the same format to bring your tasks in from elsewhere. For a task that's not yet completed, just leave that field blank.