We have mentioned Worx4 X on here before, but this example should give you an indication of why this app for Final Cut Pro X (now priced at $44.99) can pay for itself with a click
Staying within FCPX, you can only 'gather up and copy media' which isn't ideal. At the recent Faster Together stage at NAB, Chris Steele from Marquis Broadcast demonstrated Worx4 X that copies and trims media saving a lot of disk space.
Ever wanted to mix things up on your FCPX timeline automatically? A new $29.99 app Random-X makes as many versions of your Project as you want!