Warning: What you are about to read may cause you to become extremely paranoid of being watched. Proceed with caution.
Step 1: Blend in with your surroundings. Wear clothes that match your environment. Don't be that guy who wears neon in a library.
Step 2: Use cover and concealment. Find a nice, large object to hide behind. Like a dumpster or a large tree. Just not a cactus, that's just silly.
Learn more about stealthy clothing.Step 3: Practice your sneaking skills. Walk up to a wall, pretend to trip and fall over, then quickly get up and continue walking. Repeat this process until you are a master of stealth.
Sneaking tutorials. Becoming a master of disguise.