The Snooze iPhone Stand allows you to access Siri and the home button by pushing down on a big button that is part of the stand.
Set up your iPhone 5 horizontally at night as a visible alarm clock, and when the alarm goes off, groggily smack the big button and tell Siri, "Wake me up in 5 minutes!" No need to remove the iPhone from the stand or fumble for the tiny button.
Best for the iPhone 5, 5s, or 5c. Works with a case on.

If you find that the case is too tight and constantly pushes the home button because you use a thicker case for your phone, try sanding the tip that pushes on the button. A little adjustment can make a big difference.
If your nightstand is on the left side of the bed, print this mirrored so that your phone will be oriented correctly when laying down.