Business users will appreciate two new features of the iOS 6 Mail app--VIP and Flagged. Contacts can be designated as VIP, and any messages from them will be uniquely flagged in the main Inbox, as well as accessible in a separate VIP folder. The VIP feature should make it much easier to make sure you don't miss important emails from your boss, spouse, co-workers, or key customers.

The Flagged feature allows you to mark received messages as "flagged" so they're easier to find and address. Items marked as Flagged appear in a separate Flagged smart mailbox, so you can quickly and easily find them again without having to scroll through the entire Inbox.

7. Do Not Disturb and SMS replies to incoming calls

If you're in an important meeting, or trying to sleep at night you don't want your iPhone buzzing or playing annoying noises. The Do Not Disturb feature lets you block incoming calls and notifications for a designated period of time. Alerts and notifications are queued up and delivered once the Do Not Disturb period expires. There's also an option to allow calls from designated people through even when Do Not Disturb is activated, so you can eliminate frivolous calls while making sure you don't miss a call from your boss or spouse.

If you are in a meeting, and you get an incoming call, you may want to respond without answering it. iOS 6 has a new Reply with Message feature that allows you to send the call to voicemail, but also sends a text message to the caller so they at least know that you're aware they called, and that you'll contact them later. Alternately, you can tap the Remind Me Later option which will alert you an hour later or when you leave your current location to remind you to return the call.