Whenever you have an application screen with multiple sections, try pressing F6 to cycle between them.
In Firefox, it toggles between the address bar and the web page — unless you’re viewing a web page with frames, in which case each press of F6 moves you to a different frame.
In Outlook, you can switch between the header of an e-mail (where you type the To address, Subject, etc.) and the body of the e-mail.
In PowerPoint, you’ll move between the slide, the notes, and the outline on the left.