Macbook Air

Show the Path in the Finder Title Bar

https://www.tekrevue.com/tip/show-path-finder-title-bar/

defaults write com.apple.finder _FXShowPosixPathInTitle -bool true; killall Finder

 

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Use the Go To Folder Keyboard Shortcut - use this to go to root folder in Finder

Go To Folder is easily one of the most useful keyboard shortcuts in the OS X Finder since you can jump anywhere instantly, and the root directory is no exception:

• Anywhere on the Mac desktop, hit Command+Shift+G, then type / and hit return to jump to root (Macintosh HD)

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Moom, Zoom
Utilities for moving windows easily.

Saw video about them here. But they may not show up next time I visit.
http://www.macworld.com/article/2972775/os-x/how-to-check-your-macs-free-hard-drive-space.html