Shortcuts for navigation:
j/k: Move selection up/down the task list
space or enter: Edit the current task
alt+j/alt+k: Move up and down the left hand pane (there are hotkeys for action list, but not projects).
alt+space or alt+enter: Edit the selected/open project.
f: “File” current task. Opens pop-up and lets me choose to move it to “Next”, “Waiting”, “Scheduled”, “Someday” or “Focus” and a project. This is brilliant for processing inbox items and is in Things 2. (Haven’t used 3).
See Things 2 shortcuts for ideas: