Clear Scale and Rotation [SOLVED]

I use Blender to model low-poly models and export them to some game engine. But when I export the model gets all twisted & rotated.
In other words:
How do I clear all rotations and stuff so that I export my models the way they appear on screen?
When I press n on a model the model in object mode the model is scaled and rotated.
I want the scales to be 1 and the rotations to be 0.
Is there an option for this or do I have to write those numbers down, go in to edit mode and rescale/rotate the whole thing?

Ctrl-A in Object mode.

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There is.

Ctrl-A : Apply size and rotation

Thanks for the quick reply :smiley: