When you have created your plan, you can go ahead and create your list of activities/tasks for this plan. To do so, on the Plans page, click on the plan name you want to create the activity for. This will take you to the Activities page. Here, click on the New Activity button and fill in the basic details of your activity. Then click the Save button and your activity is created and listed on this page. To view/add more details for this activity, click on the activity name. Here, you can then add comments/notes to this activity too.