Pretty weird that it doesn't have an alarm right? Shit is stupid.
What you have to do is go to the organizer, then to the calender, then from the menu, select 'new event', then put in the time you want to wake up, and select 'reminder', and put in 1 or 0 minutes before.... then make sure your sound profile volume is set really high.
I just got my shit a few weeks ago, so I actually haven't tried it yet, but in theory, do that and you should be all set...