Is it normal that i cant stop thinking when i try to sleep?

Very normal, it's a problem all of us have unfortunately. I would try meditation, and if you don't believe in that or it's too difficult at first,, then here's another trick:

Try to imagine what you're very own "paradise" would look like, smell, sound, taste and feel like.

Myself, I like to imagine myself on a beach in Costa Rica, sipping a beer, smoking a joint, laying on the hot sand, feeling the sun on my skin with reggae music in the background, and the waves coming ashore. That may not be evryone's paradise, but it's mine. It gets me so relaxed that I usually fall asleep within minutes

If my mind is really racing! I try to imagine with even greater detail like I try to create what my "dream house" would look like, on that same beach. And who knows with all that visualizing, maybe one day it'll come true!

Yap, i'm the same i go to bed close my eyes and the next thing you know i'm singing in my head some random song or thinking about that day that passed and even what would happen in 30 years and then i remember that i have to go to sleep it's okay most of the people are like that ^^
It only gets disturbing when i think of something funny cause i start laughing out alone like an idiot :D

Definitely.
Happens all the time to me. But I enjoy it, and I think it helps me fall asleep.
Well, it can depend. If I were freaking out about something and thinking super intensely about it and I had an anxiety feeling overcome me by overthinking whatever it was - it would be a tremendous feat to try and fall asleep.

But I've realized if you just let your thoughts flow (but not thoughts that will make you all hyped up and have norepinephrine jamming up your brain), and have these thoughts come to you, you will fall asleep much more easily (not that anyone remembers that moment, anyway).

Yes try not to drink coffee or work yourself up in anyway before going to bed. This includes removing yourself from the Internet, agreed approx. an hour before bed.

Your mind actually doesn't stop thinking anyway. What happens is your subconscious mind takes over when you fall asleep.

To try to prepare your subconscious mind people usually say think of boring things or nothing. Since both of these things involve active thinking then you may find yourself in a loop and never fall asleep. Until you eventually drop from mental exhaustion.

Here's what I have successfully tried, and I have now got in down packed and working like a dream!
Each time any thought enters your mind, disregard it and 'trick' your mind and go blank (no subject, no active thought). When another thought enters your mind again disregard it and go blank.
Continue this over and over. It usually takes at most 10 or so mins at max. and you fall asleep.

There are other 'relaxation' options like allow your feet to relax, allow your legs to relax etc etc, but this never helped me really. I just felt heavy!

Of course the only last option is to get sleeping pills from the doctor. But you need to have a sound mind before the doctor agrees to this.

I believe that thinking should do the opposite, because your exercising the mind. Try thinking about something boring.

It's so normal that you don't even understand how normal.

I tend to do this a lot myself. When this happens I usually end up writing.

Though the reasons why it occurs still plagues me. They say it can also be due too to much activity before bed. Like watching t.v, or surfing the web, listening to music, etc. Your actually suppose to stop all of these things at least an hour before bed time, so they say. Maybe you should try it?

Sometimes I lay in my bed wondering about things. Sometimes I get up and read . But I usually write poetry. I suggest you try it. I've discovered so many things while writing:)

Oh, totally!

I've been trying to focus on something I really love and know well, like my cat, dog, or horse (3 beautiful creatures that have never meant me any harm). I try to recreate the most perfect image of them in my mind; involving all of my senses. It's sometimes enough of a distraction, that I will be able relax my conscious mind enough to let sleep take over.