I am HUGE fan of Evernote, to me it's the best application available. I put everything in there, and as it works on every platform, I can always access my information.
It has just got even better for premium customers, as now you can search within MS Office an documents created in the iWork Suite of applications. Before it could search within PDF's, but now this enhances this even more.
Below is a short video demonstrating this.
I am always interested in your thoughts so if you have any comments or feedback then please feel free to add any comments, or you can mail me here