dcz, 
#shell #trick with which I surprised greybeards at the local hackerspace (which was surprising cause I'm the opposite of a #bash expert):
mv photo{tocheck,supercool}.jpg
is the same as
mv phototocheck.jpg photosupercool.jpg
The shell copies an argument with {,} inside, and each resulting argument has a different part of what's in {}.
rm plan.{md,svg,png,odt}
Have fun!