You can add any frequently used contacts to your Favorites for quick access from the left menu. To add a contact to your Favorites:

1. Navigate to the Contacts section in the left menu.
2. Tap the contact you wish to favorite to bring up its task list.
3. Tap the Title Bar at the top of the screen and then tap Edit contact.
4. Tap the Favorites field and select Show in Favorites.
5. Tap Save.