I would represent my data in a bar graphic.
Imagine this situation:
01/01/2009 - 'wake up' - 'breakfast' - 'work' - 'sleep'
02/01/2009 - 'wake up' - 'work' - 'sleep'
03/01/2009 - 'wake up' - 'pray' - 'dinner' - 'sleep' ...
I would be able to have a bar graph, like stack bar in which I can have the daily succession of this, not numeric values. I would have, for each day a multicolor bar that represent, for each color, different actions.