Here's a fun little snippet from my .vimrc. Enjoy ;-)
" tab navigation like firefox
nmap <c-s-tab> :tabprevious<cr>
nmap <c-tab> :tabnext<cr>
map <c-s-tab> :tabprevious<cr>
map <c-tab> :tabnext<cr>
imap <c-s-tab> <esc>:tabprevious<cr>i
imap <c-tab> <esc>:tabnext<cr>i
nmap <c-t> :tabnew<cr>:e<space>
imap <c-t> <esc>:tabnew<cr>:e<space>