Remove the tofu from its packaging and drain any liquid.
Wrap the tofu block completely in a clean kitchen towel.
Place the wrapped tofu on a rimmed baking sheet to catch released liquid.
Set a cast-iron skillet on top of the wrapped tofu to apply even weight; if you don't have a cast-iron skillet, use a small cutting board topped with a heavy book or canned goods.
Press for 30 minutes, then unwrap and use the tofu in your desired recipe.
Notes
No cast-iron pan required; a cutting board and heavy object work fine.
Use a rimmed baking sheet to catch moisture.
Pressing for 30 minutes yields firmer texture for better browning.