Got my S2 this coming wed and just wanted to say thanks for all the posts on here about what it consists of.
Also, don't know if this will be helpful at all but it's quite fun, try
Brain Games & Brain Training - Lumosity. You can get a free 7 day trial which is kinda cool and its got some handy little tests. I did S2 last year and none of the tests on there are exactly the same but some of them involve similar concepts so may help just with speed.
Anyone else got their S2 on wednesday?