Pound the steak with a meat mallet to break down tough fibers
Marinate it in an acidic mixture such as buttermilk, vinegar, or lemon juice
Use a salt-based dry brine before cooking
Cook it low and slow to keep it tender
Avoid overcooking cube steak
Slice it against the grain after cooking
Simmer it in gravy or sauce to add moisture
Let it rest briefly before serving