I was trying to take a photo of my son who had put on spy glasses and mustache. I took out Canon T3i and fired the shot. Camera needed .5s and that is too long for my hands to hold the camera steady. It is even more difficult for my son to be not moving for that much time!!
The result was a blurry shot as shown below.
I immediately turned the flash on and the Canon T3i bumped up shutter speed to 1/80 and result was a nice photo. In Auto mode, my camera was struggling but then I added a little command to the camera and asked it to use the flash. The result is in the photo below.
As I keep saying in this blog, you really don't need expensive camera all the time; just learn some basic tricks and you will be amazed by the photos you can take with the same camera.
Personal tip: When you are inside or in low light and you need to take sharp photos, first think of using flash and if you decide not to use it for some reason, boost the ISO.
One more example:
I was inside Luxor casino/hotel in Las Vegas trying to take a photo with Pentax K100d. Due to strong backlight, camera didn't think it was necessary to turn on the flash.
Here is first photo in Auto mode:
I turned the flash on and you can see the how the photo turned out this time.