You might've seen few people in public worlds physically walking around the instance without even touching their movement joystick. When I first saw this. I was extremely puzzled, but as time passed I managed to figure out how to do it, and so, after about a year I've randomly decided to make this guide and share. So:

The basis, you'll need Full Body Tracking, otherwise you might as well just gently push the joystick/movement pad. This will work in pretty much any game, so even if you don't have FBT, you can still use this to, for example, walk on air in Zenith MMO or move at your own pace in games with set movement speeds.
Another thing you need is a medium or larger sized playspace. The bigger the better. If you get more advanced, you might be able to manage a small one.
'Infinite walking' allows you to burn a few extra calories while in VR, and I find that it's good to fend off any back pain you might get if you were to stand still for the majority of your VR session.

Recommended:

• Turn Signal - Tells you how much you've spun, highly configurable and only noticeable when you look for it's icon, very useful app - Link.
  
• A vibrant playspace color - I set mine to blue, it stands out amongst most colors.

Start off by standing at the edge of your playspace, facing towards the other side. Without touching your movement stick, walk to the end of your playspace and turn around 180°. While you turn, move your rotation joystick/control the opposite way to you turning. Try your best to match the speed you turn virtually and in real life. Practice walking to and fro each end of your playspace a few times.
If you turn left in real life, turn right virtually and vice versa.
Congrats! You've nailed down the core principle!

Now you need to do the same thing, but walking in a square (or triangle if your room is an odd shape). Walk from one corner to the other, turn 90° IRL, and -90° virtually. Rinse and repeat.

Some people recommend walking in a figure 8 so you don't tangle your cable if you have one. If you use TurnSignal, you can just keep track on how much you've rotated, and start turning the opposite way when you decide to do so.
It is also possible to just walk in a circle while constantly matching turning speeds. This, however, will probably end up with you getting dizzy, plus you'll look slightly tilted in game while walking.

================================

This is a very basic thing to learn and do, but it'll always puzzle most people who pay attention. If you only walk physically throughout an entire world, someone is bound to take notice. If you have a huge room, try running! I am not responsible for any broken hardware from the result of running straight into a wall (looking at you, Tamper). The better you get at walking, the better it'll look!
Now get out there and start walking!

================================

If you're interested in some funky VR content, I have a YouTube channel I regularly post funky content on. I'm always striving to have the most advanced VR setup I can get, and make fun content out of it.
It would be awesome if you subscribed B)

https://www.youtube.com/c/ImperfectAce