Have you got friends or roomies who would be willing to help? Every time I ask someone to ensure I'm awake at a specific time, I wake up before my alarm AND before the friend wakes me up. Though it is only a trick I use for important occasions, it has a perfect success rate for me.

If you can't get someone to help, and you are capable of receiving phone calls, depending on time zone and time of day, I would be willing to give you the occasional wake-up call.