For the longest time, I've been wondering how I can quickly retrieve all my unread email in GMail. I tried manually clicking the "next" links to go through my large inbox. But with more than 9,500 messages now, its just impossible to find the unread ones.
I did some Google search and found the simple answer -- just type label:unread in the search box and click the "search mail" button! That's all there is to it!