Keeping lap cool from laptop?

[mikehende]

What's the best thing/way to keep you lap cool while you are using your laptop which is placed on you lap? I am looking at laptop coolers but I am wondering if the base of those get hot too? Or is there anything better?

[Jiggy]

I`ve used a tea/dinner tray, a lap size bit of ply wood wich you can cut out the middle to help air flow.