How to wake yourself up?

You woke up in the wrong part of your sleep cycle. Believe it or not, as simple as it sounds, the best way is to snooze for even 5 mins, but you gotta turn your brain off (i mean actually fall back asleep, so that your brain can "fast forward" to the "awake" cycle). Most of us go thru 5-6 sleep cycles a night. Each cycle is approx 40 mins. Each 40 mins cycle is divided (roughly equally) into 20mins REM (dream sleep) and 20 mins NREM (non-REM). Non-Rem is further divided into Stage 1-4. Stages 3 & 4 are your "deep sleep" (makes you feel refreshed and that's where your muscles/body tissues heal overnight etc). You're paralyzed during REM sleep. Sometimes people feel physically tired when they wake up during REM, because they're body hasn't "woken up" yet. Well, that's the best I can do. I really hope I helped you. Basically hitting the snooze one more time, even though it's generally a bad habit, would be good this time (or next time). Take it easy and thanks.