Useful little one liners. This one makes copy of subset of dir/ and below based on finding files that match the criteria. In this case, I wanted all .doc files copied into a single place.
I run most of this stuff in Windows on Cygwin, so I use the:
-print0 | xargs -0
part to handle the spaces in file and directory names.
find /cygdrive/f/dir1/ -name '*.doc' -print0 | xargs -0 cp -a --target-directory=/cygdrive/c/Temp --parents