Help..

I have started to have the some problem. Can't get sleep before 4am.

Put all electronics out of your bed room, make your bed a sanctuary for sleep and relaxation.
And sex.

Take a warm shower before bed to help getting drowsy :p

You could also make using your computer eg. After 22 banned :p

Try 3 hours later

If been considering setting up a script that changes the password to a random string after midnight and shuts down the PC for the night. But I am still unsure how to change it back while not being logged in.

Following a similar pattern to @lotd I tried simply lying down and closing my eyes. I fell asleep within minutes. Not enough discipline to keep up the practice though.

@vringar, two cron scripts? One that randomize and one that reverts to your old password. ?

I discovered this gem f.lux check it out guys. This might be the potential solution I've been looking for.

@nocturnal f.lux is indeed very good! I use an equivalent on phone too. Twilight

@vringar What if there's emergency situation and you REALLY need to access your PC?

@athlon i have a 16gb stick with a rescue Ubuntu laying around somewhere

@lotd Sex without a camera... Lame

@J4s0n eh, I don't see the point unless you're somehow making profit of it.