Vim is extremely configurable. Now that you're especially interested in productivity, you'll want to configure your editor with everything you need to shred as fast as possible with vim.
Do not! just copy lines from another vimrc into yours without
knowing what that is doing. Now is a good time to blowaway your
existing .vimrc and start from
scratch.
Then read through A good vimrc learn about some good
settings to consider for your .vimrc.