Are there any practical methods of steganography? There isn't a whole lot of information on steganography in the modern age, from what I can tell. A google search for steganography usually brings up a list of very impractical methods (e.g. tattooing a message on a guy's head then waiting for hair to grow over it). The only modern (and practical) method I've seen involves manipulating the least significant bits of an image. This method appears everywhere when you search for steganography. Are there any other practical methods of steganography?
The International Journal of Soft Computing and Engineering has published many articles on the subject.

If you want to move away from simple bit-twiddling in lossless images, take a look at spread-spectrum techniques for images and audio files.

There are plenty of tools available for hiding data in compressed images and audio (e.g., Steghide, JPHide and Outguess). However, it is often possible to detect when they have been used (e.g., using neural networks).