Hotkeys to create additional cursors in Sublime Text

Take advantage of the select_lines command to quickly create cursors above or below your existing cursor with these keybindings:

{
    "keys": ["super+alt+up"],
    "command": "select_lines",
    "args": {"forward": false}
},
{
    "keys": ["super+alt+down"],
    "command": "select_lines",
    "args": {"forward": true}
}

This may not immediately seem that useful, but just start playing around with it and you'll see the potential. I use it at least a few times every day.