Translation of "Pad" in Spanish

I need a mouse pad.

Necesito un mousepad.

And that's sort of like your mental scratch pad,

Es como nuestra libreta de apuntes mental,

And had a re-launch pad to whatever it was that I wanted to do next.

y tenía una plataforma de relanzamiento para lo que quisiera hacer.

If your essay is on the short side, you can always pad it out with a few quotations.

Si tu ensayo se te queda un poco corto, siempre puedes rellenarlo con algunas citas.