Sky Map Phone App
This app does exactly as the name suggests, which is provide a map of the sky. You turn it on, then point your phone in the direction you wish to look at, and the app displays a map of the sky in that direction. It's a very simple and effective way to determine what you're looking at.
What's also cool is you can point your phone downward, toward the ground, and it will show you the portion of the sky that is currently blocked! Give it a try. It's a free download from the mobile app store and very useful to have whenever you're looking at the sky.