Learn to become lucid in dreams

Begin the practice of lucid dreaming when you can recall at least one dream per night.
Lucidity is based on dream recall, so it won’t work if you aren’t able to remember your dreams.

Go through your dreams and choose a ‘reality test’—an easy way to check if you are awake or dreaming at any given moment.
Use your regular dream content to choose something that could happen in your dreams but not in reality. For example, seeing something bizarre (a purple banana, an upside-down tree); seeing things change in unnatural ways (people changing into animals, things changing color or shape or size, written words, decorative patterns or time on the clock changing randomly); being able to do unnatural things (walk through walls, fly).

Practice your chosen ‘reality test’ at regular intervals throughout the day.
It is important to make it a genuine experiment as if you really don’t know whether you are awake or dreaming. Try not to automatically assume you are awake—instead, cultivate an attitude of curiosity and wonder: could I be dreaming right now? How do I know for sure that I’m not dreaming right now?

Meditate regularly, ideally just before going to bed.
Regular meditation helps enhance conscious awareness of dreaming and dream states.

Before sleeping, set an intention to recognize when you are dreaming, and remind yourself to perform a reality check while dreaming.
Write this down and place it near your bed, or state your intention out loud or in your head like a mantra.

Wake yourself up either 4.5hours or 6hrs after sleeping (just before your last REM cycle begins).
You can use an alarm or set an intention to wake up at this time before going to sleep. Record your dreams as you wake up, replay them in your head, and notice points at which you could have become lucid in those dreams. Then, repeat your intention to become lucid again before going back to sleep.

If you tend to wake up right after you become aware that you are dreaming, try different ways to ‘solidify’ your presence in the dream.
For example, feel your body; move around or undertake some deliberate physical action like jumping; or touch things around you to anchor yourself in the dream space.

Give yourself time to train in lucidity—it doesn’t happen overnight.
Enjoy the process and let it be as natural as possible. Applying too much effort blocks the lucidity, and when you stop trying, it happens on its own.