Siri can look at your calendar and tell you what's coming up next.
Siri can adjust screen brightness! Easier than doing it by hand, and after adjusting the brightness, Siri leaves a slider for you to play with just in case.
Siri can turn the flashlight on and off. Very handy, especially when you do it hands-free (via "Hey Siri"). Try it in the dark!
The iPhone makes a great alarm clock. Siri makes it easy to set. Tell Siri when to wake you up and she (he) will do it. Bonus tip for clearing alarms.
Hunting around on your iPhone for an app you know is there can be frustrating. The better way is to ask Siri to launch it.
Siri is good at providing sports information, including scores, game times, and TV channels. Get in the habit of asking Siri for sports information before you turn to the web.
Here's how you tell Siri to make a phone call via the speakerphone, all hands-free. Super-useful, and a real safety feature when driving. It's all in how you ask.
Siri's even better hands-free. Ask Siri to set a timer when your hands are wet or dirty. Ask Siri what the weather's like as you shave or comb your hair. And much, much more.