Best technique for task scheduling

Now a days i am working on a software , which will run a specific scheduled tasks at certain time.What should be the technique to develop this software.
One obviouse way is using Timers , but is there some built in notifications by windows.

My chedule may be like this

Task1 12:30:30 PM 7July 2004
Task2 2:30:30 PM 7July 2004
Task3 1:30:30 AM 8July 2004
Task4 12:30:30 PM 8July 2004

etc.

Waitable timers can be used for that. Have a look at CreateWaitableTimer(), SetWaitableTimer() & co.

On the other end of the scale, you can have a look at the Task Scheduler Service.