It really is very simple: just look at something and press the Delete key.

ENGADGET: Hands-on with Tobii REX, a peripheral that brings eye-tracking to any Windows 8 PC (video)

No need to press a button or delete any draft of the email.

FORBES: 10?Reasons To Hope For BlackBerry 10

If the icon doesn't provide a menu, press Ctrl-Alt-Delete, select the name of the tray application, and click the End Task button.

CNN: Sluggish PC? Give it a workout

You just open the standard Photos app, press Edit in the upper right corner, select the photo or photos you want to delete (a check mark will appear on the selected images) and then select the red "Delete" button at the upper left.

WSJ: Mossberg's Mailbox: When an iPad Isn't Enough