Recommended that you have at least some time at the linux command line. These tricks can also be done on the Mac and BSD with minor modifications.
Note: a quick grep trick for finding a file wth certain text is:
locate filename | grep search text
$ locate.pdf | grep arduino
Step 1: Whats required?
Linux based computer where you can access the command line.
A word file which should be already available in linux.
Access to the "grep" command.
Assuming you know how to do a crossword puzzle and or know how to play scrabble.
You know how to use the linux command line.