Methods and systems for enhancing the input fidelity of personal digital assistants (PDAs), and other handheld stylus-engagable computing devices are described. In some embodiments, this can be done by associating input commands with different user-input activities, including different combinations of user-input activities. By using different combinations of user-input activities to designate particular input commands, a more robust collection of commands can be provided to a user in a manner that is simple, straight-forward and easy to understand.