I’m old enough to remember when GUI became king and the idea of a computer user needing to know keyboard shortcuts to navigate a program was passé but it feels like things have come full circle and keyboard shortcuts feel more efficient. Navigating the GUI becomes mentally draining, looking for tabs, finding the right program on the task bar, etc are so much easier when I can just press a key combination to do what I want without having to search the screen.
With so much work being done within Chrome I found the following list of keyboard shortcuts to be exceptionally useful.
http://www.shortcutworld.com/en/linux/Chrome.html