Connecting to internet is only the time when I really need to use my mouse.
I give priority to my keyboard. I only use mouse when I'm tired of using keyboard or in the condition I listed above.
Actually I can't focus on the status bar. What's the keyboard shortcut to focus there?
(By status bar, I mean the panel where time, network status etc. are shown.)
Assuming you are using Unity, press Alt-F10. That will put the focus on the statusbar.
Now move with arrow keys.
Alt + F10 moves the focus to the top bar.
Now to select the indicator applet items, use the left arrow key <.
Press and hold the Win key to show available shortcuts. You will see that Alt-F10 focuses on the indicator applets, and using cursor keys you can navigate them.
Of course, you can change that shortcut.
Pressing F10 (just F10) opens up the first dropdown. And then arrow keys can be used to navigate.
From @ams's answer