[scoot]

That all sounds extremely unnatural, and uncomfortable. What's I'd be far more interested in is how to naturally change the sleep cycle to be "early to bed, early to rise", and waking naturally rested, rather than the more typical "stay up 'till dawn, sleep 'till lunchtime" routine, with enforced scattered alarms to get up earlier, with resulting sleep deprivation.

[haldujai]

I should have been more clear - those more extreme measures were only to deal with the initial change in sleep cycle from going to bed at 4 am to going to bed at 9-10 pm. It took me about a week to adjust and wasn't all that bad. Otherwise you can try shifting an 45 minutes a day (which seems to be the ideal time) until you're at where you want to be.

Now I just use Sleep Cycle.