These are 5 very useful Keyboard shortcuts for MS Project that will help you in speed up your workflow.

1. ALT + SHIFT + ARROW Key (Right Arrow for INDENT and Left Arrow for OUTDENT).
2. F2 for Editing a task.
3. CTRL + F2  to link selected tasks and CTRL + SHIFT + F2 to unlink selected tasks.
4. ALT + SHIFT + Plus Sign (+) to Expand summary tasks and ALT + SHIFT + Minus Sign (-) to Collapse summary tasks.
5. F5 to jump to a particular task or ID.

Watch this short 2 minute video on using these Keyboard shortcuts.