When I first started shooting more "seriously", I had a Nikon D80 that I shot with it until the shutter broke down. Then I had it fixed and I shot even more with it. In fact, I used it once or twice last summer. It was a great camera, but at high ISO, the pictures weren't fantastic. So in order to avoid the high ISO numbers, I always tried to shoot with as long a shutter speed as I could get away with. This led to many blurry pictures, but when I was lucky enough to get a sharp one, it wasn't so noisy.
Now I'm using the marvellous cameras in Fujis X series, that produce fantastic pictures even at high ISO numbers, but it wasn't until just a few days ago that I realized that I was still shooting with the slowest possible shutter speed and that I was still getting all these blurry pictures for no good reason. So today, I set the shutter speed to 1/250 and went on a walk to try to hammer in this new way of shooting. In fact, about half of these pictures I shot at 1/1000 while riding my bike.