A search for "bluetooth shortcut" would turn up a post from last week regarding software that meets your needs:
http://forum.ppcgeeks.com/showthread...tooth+shortcut
Basically, the best way to do it is with a software plugin that has a shortcut button. I personally use PhoneAlarm, it has repeating reminders for txts, emails, missed calls, and voicemails, and with the right skin you can toggle bluetooth and the headset profile off and on directly, not to mention switch profiles which can automatically set all of your sound/notification preferences.