Going Thru unread messages in Gmail

So I've had over 300 unread messages in my gmail account. Gets old seeing that many unread messages. They are messages I either want to keep but don't need to read now or I want to delete. So I found the easiest way to go through them. If you type the following in the search mail text box it will bring back only your unread messages. Then you can easily delete or use the 'Mark as read' button from there.

is:unread

That's it!