How to Wake Up

[Not Clickbait]
Step 1: Take a-LSD in a dream
Normally, LSD is a hallucinogen. But a-LSD is the opposite, being an anti hallucinogen. How this is physically possible is the fact you are dreaming

Step 2: Stop dreaming and wake up.
There you go. You are now awake.

Or you could ask for the 4th spacial dimension to exist.