• If a line approaches the maximum character limit, always consider breaking it down into multiple statements / expressions instead of wrapping the line.
• Break before operators.
• Break before the . in chained method calls.

popupMsg("Inbox notification: You have "
        + newMsgs + " new messages");

// Don't! Looks like two arguments
popupMsg("Inbox notification: You have " +
         newMsgs + " new messages");