To sharpen pencils, you can use a manual pencil sharpener or an electric one. For a manual sharpener, insert the pencil into the opening and twist it until the wood is shaved away and the graphite tip is exposed. Be careful not to apply too much pressure, as this can break the pencil lead. If using an electric sharpener, simply insert the pencil into the designated slot. The sharpener will automatically grip and sharpen the pencil until it reaches the desired point. Always clean the sharpener regularly to ensure it works effectively and to prevent graphite buildup.