Aside from your post, some interesting tricks I use in my global (ie. the base config I inherit on every machine I work on) ~/.vimrc:

iab _perl use strict;<CR>use warnings;<CR>
set expandtab
set tabstop=4
set shiftwidth=4
set smartindent
set nocompatible

hi folded ctermfg=none ctermbg=none

setlocal fo-=t fo-=r fo-=q fo-=o

set backspace=indent,eol,start
:nnoremap <Space> i<Space><Esc>

function GetPerlFold()
  if getline(v:lnum) =~ '^\s*sub\s'
    return ">1"
  elseif getline(v:lnum) =~ '\}\s*$'
    let my_perlnum = v:lnum
    let my_perlmax = line("$")
    while (1)
      let my_perlnum = my_perlnum + 1
      if my_perlnum > my_perlmax
        return "<1"
      endif
      let my_perldata = getline(my_perlnum)
      if my_perldata =~ '^\s*\(\#.*\)\?$'
        " do nothing
      elseif my_perldata =~ '^\s*sub\s'
        return "<1"
      else
        return "="
      endif
    endwhile
  else
    return "="
  endif
endfunction
setlocal foldexpr=GetPerlFold()
setlocal foldmethod=expr


" remove vim backup files

function RemoveVimBackup()
    w
    ! find . -name "*~" | xargs rm
endfunction

" map ii to ESC

map! ii <Esc>

" execute file currently being edited

map ,run :!./%

" custom

map ,rvb :call RemoveVimBackup()<CR>
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