Any difference between at the station and on the station

[yena]

Could anyone help me?

Is there any difference between the following sentences?

I'll see you at the station.
I'll see you on the station. Is using 'on' before the station correct?

How about these sentences?

What is on your mind?
What is in your mind?

By the way, could you recommend any good grammar books to get rid of this sort of confusion? I guess it's time to improve my grammar .

Thank you.

[Tdol]

'At the station' sounds more natural to me. I would say 'on the platform' or 'on the station forecourt'.

On my mind- worrying or troubling me
In my mind- what I am thinking about