I wish! I don't remember the last time I've slept through the night. Sometimes I've gone a couple days with no sleep. Often I'll have to go about my day with 2-4 hours. It sucks. I'm too scared of prescription medications because I had a bad experience with two and refuse to try anymore.
I get the best sleep when I've gone a day without sleep and when it rains. If it would rain every night, I'd be fine!

Good sleep hygiene will get you to sleep faster. No food before bed, no caffeine anywhere near bedtime. Take note that chocolate contains caffeine. Use your bed only for sleep, not for watching tv or reading. Try some relaxing yoga or meditation before you go to bed.

I've tried counting backwards and trying to exhaust my brain but if my brain is really active, it just won't stop. By getting into a rhythm and tiring myself out during the day, my brain learns okay now it is sleep time.

Yes, I have taught myself how to relax - which enables sleep. The biggest secret is to work hard so that you are really tired when bed time rolls around.

It's probably possible, but I doubt I could get it to work for myself.