First you have to get the screw drivers, I know there’s a good set you can get at radio shack
for about five bucks, really tiny flat head. different screw driver are good for different products.
the lager screw drivers are good for console stuff like game controllers and Ereaders.
the smaller screw divers are good for portable Nintendo devices like the game boys and the DS.
one last not if you have a small screw driver but it's to big for the thing your working on I like to use a wire cuter and snip a little off the side of the head.