What are other techniques are used to tenderize steaks apart from using a meat mallet? I'm familiar with using a meat mallet to tenderize steaks, but I'm curious what other techniques or methods there may be to achieve the same or similar results.
Many marinades will act as tenderizing agents; particularly those that are longer-term or overnight.

The acids in the mixture will act on the meat to break it down and tenderize it.