Vim Hints/Tips

Line Numbering
  (Enable)
  :set number
  :set nu
  (Disable)
  :set nonumber
  :set nonu
  :set !nu
  source: http://vim.wikia.com/wiki/Display_line_numbers

PerlBestPractices 
  (.vimrc)

Shiftwidth
Autoindent

Solarized (coloring)

FileFormat
 :set ff=unix    [unix|dos|mac]

     dos     <CR> <NL>
     unix    <NL>
     mac     <CR>

Enabling Options
http://vim.wikia.com/wiki/Managing_set_options