I read about a simple technique in a meditation book (the purpose of this was not falling asleep, but it works for me). Close your eyes and start counting with a special technique to infinity.

The trick is to count one number while breathing in... slowly counting in your head until you are done breathing in and when your breath out immediately switch to the next number. There should basically be no moment where you have time to think about anything else besides the numbers. The switch from i to i+1 must be instant. Because if you are leaving gaps your mind starts wandering again.

If you find out that you got distracted start again at 1. Don't cheat.

Just run this JavaScript code in your head the next time (recognize that there are no calls to mind.thinkAboutSomethingElse()!):

___

var i = 1;

while(!body.isSleeping()) {

  body.startBreathingIn('slow');

  mind.thinkAbout(i++);

  body.startBreathingOut('slow');

  mind.thinkAbout(i++);

___

(Also, recently I had only been awake 8h that "day", but needed to get to sleep "early" in order to get a full 8h of sleep before a client meeting the next morning. So, I made Mac&Cheese with an entire stick of butter (~1500cal + 90g fat). This seemed to slow my heart down and put me out like a light. Though this method has obvious health implications, I'd be lying if I said it didn't work like a charm... that one time.)

A summary:

1. Consume 150-250 calories of low-glycemic index foods in small quantities (low glycemic load) prior to bed.

2. Use ice baths to provoke sleep.

3. Eating your meals at set times can be as important as sleeping on a schedule.

4. Embrace 20-minute caffeine naps and ultradian multiples.

5. Turn off preoccupation with afternoon closure and present-state training.

He says he has problems falling asleep too so what works for him may work for you.

*http://www.fourhourworkweek.com/blog/2008/01/27/relax-like-a...

http://en.wikipedia.org/wiki/Mammalian_diving_reflex

    *Immediately upon facial contact with cold water, 
    the human heart rate slows down ten to twenty-five percent.*

I know your link doesn't exactly say that it does, but the summary felt kind of misleading.

- No caffeine after 3pm.

- Lower the lights as much as possible half an hour before bed.

- I have a playlist of Chopin nocturnes on my iPod I've been using for about 6 years now. I never listen to it except in bed. At this point my brain associates that music w/ sleep. Until I started doing this, I had a big problem with fast music getting stuck in my head and keeping me awake.

- Read in bed until I feel sleep coming on.

Again, routine is key. It especially helps when on the road, since your routine can help counteract the unfamiliarity of the surroundings.

  "Read in bed until I feel sleep coming on"

Not sure if there is any merit to that, but it may help.

There is a good evidence for it: http://en.wikipedia.org/wiki/Light_therapy

Basically, if you are using it late at night you are getting light therapy at the wrong time though.

I'm currently doing an experiment where I turn off the computer at 11pm to see if it makes it easier to fall asleep earlier. This is harder to stick to than it sounds at first glance though.

My bigger problem though, is that even if I can take care with the physical Insomnia, I also have mental insomnia. I find it impossible to clear my head, and that regularly keeps me up until a couple of hours before I wake up. I'm unable to sleep while my brain is thinking of something, regardless of how boring it is (until the point that my body is just so tired I can't stay awake, which is when I fall asleep), and if I manage to get my brain to a state when it could sleep, suddenly it instead thinks "but what about.." and returns to the topic that's interesting enough that it keeps my brain running in circles, unable to stop concentrating. Really annoying.

- No computer before bed. TV shows and movies on my laptop are fine, but anything active and stimulating is really bad.

- No video games at all. Even if I play them hours before bed, I can correlate that with a shitty night of sleep.

- Cut back coffee to one cup early in the day. Even though they say caffeine stays in your system only for X hours, I find that any coffee after say 2pm will probably screw with my sleep.

- Exercise. Studies conflict on whether this works but I know it works for me to be in moderately good shape rather than terrible shape.

- Low volume music. Any kind is fine for me, I've fallen asleep to punk. The key is that it be low volume.

On stretches of days when I can convince myself to cut out caffeine entirely, I find that I can actually take naps, something I normally can't do.

Summarizing: try to re-play or think about dreams that you had before. If you don't remember any, think of a story that looks like a dream (with impossible things happening etc).

The trick is that when we transition between awake and asleep we have a train of thought and suddenly there are dream-like things like surprising jumps in the thoughts, impossible occurrences etc (this is what Feynman remarked and I observed too), so I try to recreate that state.

It worked for me.

Also, I have some mp3's I bought from hypnosisdownloads.com. I think they have a few too many on there now (some look flaky), but there are a couple of really good ones. I'd never considered myself a candidate for hypnosis but have found they're able to knock me out for 15-20 min during the day, even when I'm filled with coffee! Works (for me) probably about 70% of the time - invaluable when deadlines are near.

[edit - at least one is specifically for insomnia]

I still play hockey and come home rather late. Because I'm wide awake when I get home, I do a few things which helps me fall asleep faster than tossing and turning for hours.

I take fairly hot shower and do some relaxation breathing in the shower. Afterwards, I stretch out for about 20 minutes. By the time I crawl into bed, my body is already slowing down and doze off quickly.

I think the shower loosens my muscles, and the breathing helps relax my brain. The stretching also helps my body transition to a more relaxed state.

Also tensing all muscles in your body for 10 seconds 3 times, will help you to get to some sort of physical equilibrium.

Thoughts running in your head on their own - unresolved issues from the day. Ask yourself what is in your head and visualize how you would deal with it. Just think of what you will be the next step and they will go away.

Failing all these things, calming overexciting nervous system - valerian root can do wonders for calming down.

The cold shower trick and its physiological effects sound really interesting. I always take cold showers at night but since temperatures always hover around 26-32C with close to 90% humidity (being 1 degree north of the Equator), that doesn't always help.

To keep this on-topic: I (nearly) always have success with milk, cookies, quiet music, a fiction book, and a bed. Getting off the computer and into the bed can be trying at times however.

Anyway, insomnia is like an illness, I can't sleep more than 6 hours.

Also, getting a super-confortable bed helped a lot!