Keywording is vital for an organized image library: it allows you to quickly find any photo you might need, whether it was taken yesterday or a decade ago. As well as adding keywords when you import into Lightroom, you have lots of keywording options in the Library Module. Here you can add keywords to the field (press Cmd/Ctrl+K to quickly make the box active), or use the Keyword Sets Panel to add common tags (hold Alt and you’ll see numbers appear against each; tap a number to add). Under the Metadata menu you can also set up your own custom keyword shortcut, which you can then add to highlighted images by tapping Shift+K (think K for keyword). The spray can found at the bottom of the panel (when in Grid View) can also be loaded with keywords. With it you can sample keywords from one photo, then spray over others to quickly copy them.