Using Newgrind is a breeze. First, make sure you've chosen the right grinding surface for your job. Then, turn on the tool and gently guide it over the area you want to grind. Keep a steady hand for the best results. When using, always wear safety goggles to protect your eyes from debris. Don't apply too much pressure as it might damage the tool or the material you're grinding. After use, let the tool cool down. Clean it regularly with a dry cloth to remove dust and debris. Store it in a dry place to prevent rust and damage. With proper use and care, Newgrind will serve you well for a long time.