Some Gmail Tricks

You use l to represent the term label followed by a colon
then the two character shorthand to represent the label name, as follows: 

l:^u - Unread Messages
l:^i - Inbox
l:^t - Starred Messages
l:^f - Sent Mail
l:^b - Chats
l:^r - Drafts
l:^s - Spam
l:^k - Trash