If I have a website called Blog with two main sub pages; about me and bio, I like to have the HTML title to always be My Site: Current page. Since all of my controllers have descriptive names, I can just put the following in my layout:
This would give me the following when users navigate to my site:
Blog (mysite.com)
Blog: About Me (mysite.com/about-me)
Blog: Bio (mysite.com/bio)