Use higher ISO settings only when necessary; keep ISO as low as possible
Increase exposure by using a slower shutter speed or wider aperture
Shoot in better lighting conditions or add external light sources
Use a tripod to allow longer exposures without blur
Enable noise reduction settings in your camera
Shoot in RAW format for better post-processing flexibility
Apply noise reduction tools in editing software like Lightroom or Photoshop
Use sharpening carefully after noise reduction
Avoid excessive digital zoom; move closer instead
Upgrade to a camera with a larger sensor or better low-light performance