What are the best techniques for achieving a darker wood stain on furniture?

To achieve a darker wood stain on furniture, the best techniques include sanding the wood to remove any existing finish, applying a pre-stain wood conditioner to help the stain absorb evenly, using a high-quality wood stain with a darker color, and applying multiple coats of stain to deepen the color. Additionally, allowing each coat to dry completely before applying the next coat will help achieve a rich, dark finish.