You can begin playing a clip in the Viewer and while it continues to play you can rename the clip in the Browser which can speed up organizing a project.
I'll double-click a clip in the Browser, then tap the spacebar to play it.
Click on the clip in the Browser, type in the name I want then (for once you shouldn't use a keyboard command to return to the Browser as it will stop playback, use the mouse here. Yeah, I know…) hit Return.
Then hit Down Arrow to highlight the next clip then Return to load it into the Viewer, then Spacebar to begin playing it.
Use the mouse to click on the file's name in the Browser and begin naming…wash, rinse, repeat.
So the pattern is:
1. Double-click clip in the Browser
2. Hit Spacebar
3. Use mouse to click on file name in Browser and (re)name
4. Hit Return
5. Hit Down Arrow
6. Hit Return then goto step #2.
To stop playback after you name the last file I have the habit of hitting Command + 1 to highlight the Viewer but you can stop playback many other ways without using the mouse.