Question: On iOS devices you can take a screenshot by pressing the home & sleep buttons at the same time. Is there a similar way to take a screenshot with Windows Phone?

Answer: 
For devices still running Windows Phone 8, hold the power button and then press the Windows key. The screenshot will then be stored in a "Screenshots" album in the photos.

For those updated to Windows Phone 8.1, press and hold `power`+`volume up` simultaneously.

There is a video [guide from Microsoft on YouTube](http://www.youtube.com/watch?v=Pxi5uYX-5-E)
There are a few ways to take screenshots:

1. If you're just a developer and just want to take screenshots for marketing your app, you can use the [emulator's screenshot tool](http://msdn.microsoft.com/en-us/library/gg442300%28v=VS.92%29.aspx).
2. If you have a developer-unlocked phone ([$99 a year from Microsoft](http://create.msdn.com/), or via unofficial tools) you can use [third-party apps like the one described here](http://www.winsupersite.com/article/windowsphone75/windows-phone-75-screenshots-141063).