You can create to-dos and events in a number of ways:
1. From the Home Page - Click the Add item button
2. From the Deals Page - Click the Add to-do link
3. From the Leads Tab - Click on a row to expose the To-dos tab; Enter your to-do.
4. From the Calendar Tab - Click on the green + sign to add the item directly on the calendar
Note: Due dates are currently required for all to-dos and events.