Screenshot Image Capture
Here is one of my favorites. To capture a screenshot, press the Home "n" button and the minus "-" Volume button at the same time. A camera icon will appear in the lower left corner status bar indicating a Notification that says "Screenshot captured". Click on the notification and it will launch the image in the gallery. A copy of the image is saved to your Library in the folder /media/Screenshots in png format.
Tip: it just needs a quick simultaneous press so don't hold the volume button for too long or it can affect the image.