It's crucial to follow proper installation practices to minimize cracks and imperfections in drywall. Start by using high-quality drywall sheets that are suited for the specific application. Ensure that the framing is stable and properly spaced to prevent excessive movement. Use drywall screws or nails at appropriate intervals and avoid overdriving them. Tape and mud the seams and corners with care, using multiple thin coats for a smooth finish. Sand the drywall surface before applying paint or texture to achieve a flawless result.