Yes, it's possible. I haven't used an alarm clock in about 5 years or more. I used to have a paper route, so I would have to wake up at 4am, every single day. After a couple years, it got to the point I could go to bed at night and say in my head 'wake up at 4' and pow.. I woke up around 3 or 4, but always early. I did find if I didn't remind myself before bed, I would definately not wake up on time. I still just 'wake up' for work to this day. I hope this helps!

I've heard of many ways to set an internal or biological alarm to wake up without an alarm clock, however the best one I know (and experienced myself) is the one teached by the Silva Method to Mind Control. You can buy a "Silva Method" basics book in almost any bookstore (or get one on your local Library). The "Awake Control" is one of the entry level techniques. It's also part of the Silva BLS Program. For more information go to: http://www.silvamethod.com (you will be amazed with the variety of simple but useful techniques they teach, from self-relaxation and sleep control to self-headache-relief and memory improvement). Just in case, I'm not connected in any way with them, I'm only a user of the method who has very satisfactory results.

A tidbit which may not help in your case. Fellows who need to get up in a few hours for night watch will resort to drinking a lot of fluids before going to sleep. You can count on having to go to the bathroom within a few hours....

Just do it. I've been waking without an alarm clock for years now. I never had any special training or anything. In my school days and early working days, I absolutely HATED being startled awake out of a sound sleep by a $&*# alarm clock! One day, I got a good expensive clock that had a volume setting on the alarm. Each day, I gradually set the volume slightly lower and lower to see how low I could get it so that it would still wake me up but not startle me awake. I discovered, after all that, that I didn't even need the alarm! I woke up, looked at the clock, and saw that it was within 10 minuites of the time I normally get up. I've even discovered, over the years, that I can "set" my internal clock to wake me within 10 minutes of whenever I need to wake! Uhm, this won't work, however, if you don't go to bed at a reasonable hour. If you stay up well after midnight, your internal clock WILL NOT wake you up for work early in the morning! Now, mt will take you a little courage to risk being late for work one day to test your internal clock, but try it and see before you go for any special training... Alternatively, if you're like me and just HATE being startled awake, and don't trust yourself to wake automatically, before I discovered that I don't need an alarm clock, I ran across a clock that, instead of an alarm, had a light that gets gradually brighter over 15 minutes or so.

The best way is to get into a routine whereas you go to bed at the same time and wake up the same time as your body will naturally set its own alarm clock. Also it is better to have an alarm clock that gradualy turns on music or a light as mentioned, as you will awake when you are not in a period of deep sleep or REM sleep but in a period of sleep where you are more easily woken - this means that you should not feel as tired as if you were startled awake by a loud beeping or similiar.

The most simple way is to place the alarm clock in a part of the room where you would have to literally get up out of the bed to shut it off,also using 2 clocks set 5 minutes apart in different parts of the room can help.