For single entry post pages, I like putting the post title before the blog title in the HTML title element. For me, it it just helps keep track of things easier.
The wp_title template tag is very nice, but currently there is no option for putting the separator before the blog title.
If you have a separator, it goes after the blog title, not before. As my blog title appears after the post title in single post pages, I can't use a separator, as it would just be at the very end of the of the title, and thus not helpful
Current: Title of post Title of blog >>
Ideal: Title of post >> Title of blog