Tasks

The system facilitates scheduling of tasks and their assignment to one user or user group (See "Settings > Groups" for user groups). Tasks cannot be assigned to additional users or linked to more than one Contact. However, tasks can be transferred to others by modifying the task owner.

To create a new task, follow the "New Task" link.
The window that comes up has all the fields that are necessary to schedule the task as shown below.
The "Status" and "Priority" drop-down list is populated from "Settings > Picklist Settings > Edit Task Picklist" and be customized there. Customizing it will allow you to track progress along the vectors that make sense for your business.
The rest of the fields are self-explanatory and please make your entries as per the logistics of the event. The mandatory fields are marked with a red *.
Click the "Save" button to create the task.

Tasks are not posted to the calendar but are displayed in

The "Activities" tab
As an activity under the related lists for associated contacts, accounts, sales orders etc. that it is linked to when creating the task.
The "Home" tab under "My Upcoming and Pending Activities"