Indent multiple lines quickly
Use >
e.g. to indent 5 lines use:
5>>
To mark a block of 3 lines and indent in vim, use:
Vjj>
http://stackoverflow.com/questions/235839/how-do-i-indent-multiple-lines-quickly-in-vi
Repeat last change
Use .
e.g. if deleting a word with dw
then just hit .
to repeat.
http://vim.wikia.com/wiki/Repeat_last_change
Split screen and view another file
:vsplit <file>
https://www.cs.oberlin.edu/~kuperman/help/vim/windows.html