What are the best techniques for applying drywall tape to achieve a smooth and seamless finish?

The best techniques for applying drywall tape to achieve a smooth and seamless finish include ensuring the drywall is properly prepared, applying an even layer of joint compound under the tape, pressing the tape firmly into the compound, and feathering out the edges with additional compound for a seamless blend. Sanding between layers and using a high-quality taping knife can also help achieve a professional finish.