If you don't have a tofu press, you can use any heavy object to press the excess liquid out. Make sure that you press the tofu on a flat sturdy surface, something like a cutting board on the kitchen counter. Wrap the block of tofu with a clean kitchen towel or a few paper towels before placing the heavy thing on top. Whatever you choose to wrap the tofu in will become wet. There's also a chance that the heavy-weighted object will get wet also. You can use a heavy pot, a book, or something else that has some weight to it to pres the tofu. If you're using this method, you'll need to press the tofu for about 45 minutes.