The sorting functions for projects and contexts as well as the functions for lowering and increasing priority are missing from the documentation.
Quick install
git clone git://github.com/freitass/todo.txt-vim.git
cd todo.txt-vim
cp -R * ~/.vim
This plugin gives syntax highlighting to todo.txt files. It also defines a few mappings, to help with edition of these files:
<leader>-s : Sort the file
<leader>-s+ : Sort the file on +Projects
<leader>-s@ : Sort the file on @Contexts
<leader>-j : Lower the priority (cursor must by on priority)
<leader>-k : Increase the priority (cursor must by on priority)
<leader>-d : Insert the current date
date<tab> : (Insert mode) Insert the current date
<leader>-x : Mark task as done (inserts current date as completion date)
<leader>-X : Mark all tasks as completed
<leader>-D : Remove completed tasks
If you want the help installed run ":helptags ~/.vim/doc" inside vim after having copied the files. Then you will be able to get the commands help with: :h todo.txt