I've seen lots of people be able to navigate through the computer (PC) using only the keyboard. It seems much more efficient, but I don't know many simple tasks. I've downloaded Quicksilver, and I know basic shortcuts (saving, printing, command tab, etc.). I don't know how to switch the active window when using the same application. The only way I know to switch the window is using command tab, but that's between applications. Is there another way to do this?? Also, on Windows, I can use the arrow keys to navigate through options on a window and press enter to execute. How can I do this on a mac? Any other simple tasks that I need to know??