Here are few techniques that allows to shift selected text more than once:
1)
press ESC
press “v” to enter visual mode
select text
SHIFT plus “>” twice
press “.” to repeat last indent
2)
press ESC
press “v” to enter visual mode
select text
SHIFT plus “>” twice
press “g” then “v” and use any indent you require
In order to automate this method add following to your .vimrc file:
vnoremap < <gv
vnoremap > >gv