How can I effectively apply polyurethane on stained wood to achieve a durable and glossy finish?

To effectively apply polyurethane on stained wood for a durable and glossy finish, follow these steps:

1. Sand the wood surface to ensure it is smooth and free of imperfections.
2. Apply a coat of stain to the wood and allow it to dry completely.
3. Use a high-quality brush to apply a thin, even coat of polyurethane, following the wood grain.
4. Allow the first coat to dry completely before lightly sanding with fine-grit sandpaper.
5. Apply additional coats of polyurethane, sanding between each coat for a smooth finish.
6. Allow the final coat to dry completely before buffing with a soft cloth for a glossy finish.