Nice little gmail trick
Historical article · Originally published February 4, 2008; technical details may be outdated.
I just realized a cool trick in Gmail (and google for domains mail):
you can check one message, then go further down or up in the list several messages and shift-click on its check box, and it will work like a regular list box - all the messages in between the two will be selected as well!
Unexpected coolness is the best kind.