There are any number of methods, but the goal is being aware that you are in a dream.

The methods I found most effective were dream journaling and reality testing.

Everyday, you record whatever concrete information you definitely remember happening in the dream, even if it’s just a red t-shirt someone was wearing for example.

Write it down somewhere, journal or notepad.

Very rapidly, you’ll begin remembering more and more of your dreams.

That helps you recognize a dream state.

The other thing I did is reality testing, when you make sure you’re awake.

So I will basically wave a hand or a couple fingers every now and then during the day and try to move something with my mind.

And then one day I was in my garage and as a reality rest, I telekinetically lifted the hood on my car.

And when the hood lifted, I realized “oh, I’m dreaming.”

Once you’re aware, the most important thing is to stay calm and not make drastic changes. Just tried to influence what you can within the context of the dream, and then you get better and better at it.