Question: The one-liner should:

* solve a real-world problem
* not be extensively cryptic (should be easy to understand and reproduce)
* be worth the time it takes to write it (should not be too clever)

I'm looking for practical tips and tricks (complementary examples for `perldoc perlrun`).

Answer: 
Please see my slides for ["A Field Guide To The Perl Command Line Options."](https://web.archive.org/web/20120916013412/http://petdance.com/perl/command-line-options.pdf)
Remove MS-DOS line-endings.

```
perl -p -i -e 's/\r\n$/\n/' htdocs/*.asp

```