Use the highest resolution available
Improve lighting before taking the photo
Keep the camera steady
Clean the camera lens
Focus on the subject accurately
Avoid digital zoom
Use a lower ISO when possible
Adjust exposure properly
Shoot in RAW format
Edit with professional photo software
Sharpen carefully
Reduce noise
Correct white balance
Increase contrast moderately
Crop to improve composition
Use a tripod for stability
Enable image stabilization
Use portrait or pro mode when needed
Retake blurry or poorly lit shots
Export in a high-quality format
Avoid excessive filters and compression