How can I remote support an Android tablet?
I attempted to get VNC options working, but they're all buggy.  In particular the keyboard mappings and clunky and the screens never seem to render correctly.  I even wrote to an author offering money for improvements but never got anything back.

Teamviewer 8 is the only solution I've found where it actually works the way it is supposed to (i.e. seamlessly).  Teamviewer is free for personal use, which is a bonus, but it is by far and away the best solution I have found.  It properly supports the Android home/nav keys and has complete and properly mapped support for keyboard input.

To use it, install Teamviewer 8 on your PC/Mac, and "Teamviewer Quicksupport" on your Android device.  As far as I know, root is not required.

No, I don't work for Teamviewer.