One of our readers sent in what I thought was a relatively straightforward BlackBerry 10 tip posted by our colleagues at CrackBerry on how to reject an incoming call. To do that you simply swipe up from the middle of the screen instead of swiping down to accept the call. The problem with rejecting a call is that it immediately sends the caller to voicemail making them think you are avoiding them. That is why there is a third option to silence the ringer instead of rejecting the call.
To silence the ringer on an incoming call with your BlackBerry 10 device you can simply press any of the volume keys. On top of that you can also just tap on the middle of the screen instead of swiping.
Let us know if you have any other good tips!