I was going to ask how to see unanswered questions with my tags sorted newest first but found it already asked and answered. Except I'm not familiar with userscripts.org and have no idea how to run them. How do I run the script mentioned in this answer?
It depends on your browser. In Firefox, you need the Greasemonkey extension installed. Then just hit the install button on the web-page for the script of your choice.
This is all explained on the userscripts site itself.