How to win as black with king and queen vs white king, pawn

How to win in this position as black 

@1

You cannot win that: it is a known draw.
You can win the pawn, but then it is stalemate with the king in the corner.
With an a-, c-, f-, or h-pawn it is a draw.
With a b-, d-, e-, or g- pawn it is a win. The method is to force the king in front of his pawn with the queen and then advance the king until checkmate.

@3
That is not hard to remember. It is logical.
With a, c, f, h pawn there is stalemate, with b, c, e, g pawn there is no stalemate.

If you look at the analysis it's dead lost for white after qh8

Qh8 pretty much the only winning move for black

It's important to note that the "bishop pawns" are generally draws because of this stalemate trick:

The side pawns are also draws because of this stalemate trick:

Thanks guys for your help