What's in your .vimrc file?
slmbrhrt: Here are just a couple things I find really useful day to day. I used to have a timeout that would revert to normal mode from insert mode after about 30 seconds if idle, but I got tired of that after about six months and just got in the habit of hitting Escape when I finished with an insert action. I did it just now, even though this is a textarea.  " For (ab)use with :sp
  map <C-j> <C-W>j<C-W>_
  map <C-k> <C-W>k<C-W>_
  set wmh=0 so=999 winheight=999

  nnoremap i :noh<CR>i

  " \s is global-replace-this-word
  :nnoremap <Leader>s :%s/\<<C-r><C-w>\>//g<Left><Left>