More email management
The Mail app in iOS 7 has several changes that will make using it easier. One is the new set of options that appear when you flick to the left over a message or select messages and tap More for both iPad and iPhone. When you flick, you get the More button in addition to the Trash button, and from More you get the options in the message view's Mark and Move controls. When you select multiple messages, tap Mark to get your options. The Move to Trash option is very handy.
Also handy: When you tap Edit in the message list but select no messages, the Mark button becomes Mark All, to quickly flag or mark as read all of a mailbox's messages.