To indent a set of eight lines in vim, from the first one, in normal (esc) mode:
8>>
To indent a curly braces block, go to a curly brace and:
>%
To mark and indent (using 'm' as the marking letter, the first m is the marking command):
Enter mm at the top of block to indent, go down to the end of what needs to be indented, and type >'m