For Before I Forget, save your Star Power up until the Bridge (make sure you have full star power, you can worry about 5*ing it later 8-) ). 3's and 7's and Knights of Cydonia aren't very hard in my opinion, for KoC just get alt-strumming down (don't strum TOO fast, strum at a relatively lax speed), but 3's and 7's I have no clue what tips to give you...Stricken is easy enough that you should be able to beat it with a little practice, I personally love playing it. And when you have to beat Cult of Personality, save up your SP until the solos, they're great fun to play anyways. Off-topic: Whoo, just gotta 5* Raining Blood, Number of the Beast, and One, and I'll have 5*ed everything on Hard! :D