Here are some useful shortcut keys for the open/save dialog window of macos X:

Spacebar – View the selected item in Quick Look
Command+D – Selects Desktop as the destination
Command+Shift+H – Sets the Home directory as the destination
Command+Shift+A – Sets Applications directory as the destination
Command+Shift+. – Toggle invisible items
Command+Shift+G – Bring up Go To Folder window
Tab – Tab key auto-completes paths and file names from the aforementioned Go To window
Command+R – Open the selected item in the Finder
Command+F – Move the cursor to the Find field
Command+. – Close the Open/Save dialog window

Create shortcut by click and drag in Mac OS X

To create a shortcut in Mac Os X you can right-click (click+ctrl) and chose the option "Make alias", and then move this alias where you want it.

Or you can drag the target of the alias and also press Command(apple button)+option. The alias will be created where you drop the file.

Kindle reboot and network choice

To reboot the kindle you must do:
1. Menu
2. Settings
3. Menu
4. Restart

To choose manually the network to connect to do:
1. Menu
2. Settings
3. Type 311
You will get a menu with the detected networks.