Craziest prep for interview :

Step 1 : Given sufficient time for the scheduled interview by any company, start by searching "How to prepare for Google interviews". Awe at the information before you and get all pumped up to jump in.

Step 2 : Starting with Algorithms, study each one and try not to mix any of them in confusion. In case you are stuck in whiteboard coding, close your eyes, take deep breath and visualize Don Kunth. If that doesn't help, well you are ruined anyway.

Step 3: Practice coding without internet connection, till you are able to write code while you talk about how the weather is really great today. Libraries and methods should flow like poetry. SO is sin.

Step 4: The X programming language which you added to your resume because you can write Hello World, head over to Wikipedia and read more about it just in case.

Step 5: Read some xkcd comics so you can impress the interviewer with some humor. You can try Dilbert too.