One easy way to do this is to check your 'workload', which is the wheelbarrow icon in the toolbar at the bottom of your course pages.
The toolbar lies outside of packets, but is accessible from almost all other course pages.
Once you access your workload, you'll see a set of links leading to each assignment, worksheet, quiz or exam that is due. Once you complete and submit an item for grading, it disappears from your workload. Once the due date passes, it will disappear as well.
