As DinoSawr said, the CANWILD technique is VERY useful. I have found great success with it. A big issue with that is finding some sort of app or device that will play a short sound and turn off. However, if you have a phone with calendar alerts or reminders, you can set a short (2-3 second) sound to go off at the right time. With a little time, you'll find the precise time in your sleep schedule and volume needed to just barely wake you up. If you get it right, you can basically induce a DEILD rather than relying on possibly waking up after a dream.