The reasons you could get blur and how to solve them:

Camera Blur - Faster Shutter Speed (at the expense of ISO or Aperture), better positioning, or mounting the camera to a tripod.
Object Blur - Faster Shutter Speed (at the expense of ISO or Aperture), track the moving object.
Out of focus - Focus more accurately, Increase F-stop (smaller aperture, at the expense of ISO or Shutter Speed).