Orangoat
In that sense there is nothing you can do to prepare. Things which can help increase your reaction times, your memory and your logic bare good things to do. There is nothing you can find on-line for free which will give you anything similar, so those links which can help you practice those skills are a good bet. Oh and learning a compass and your lefts and rights from different angles (Ie something in relation to another object, where is it in relation to them, left/right, and they aren't always in the same position, ie facing backwards or forwards)