Related to Is there an easy way to discard all messages waiting to be reviewed?, one might also want to accept all messages (if, for example, there was a mistake in the list config). There is no convenient checkbox for this in the interface (since discarding is a much more common task), but you can use a bookmarklet to change all the messages from "Defer" to "Accept"
Be careful with this! You might want to review the messages before hitting submit to avoid accidentally spamming your users.
This is one of many Frequently Asked Questions.