This is the most important skill you will ever learn and can be applied in any situation.

1) Find a nice comfy chair.
2) Plop yourself down into the chair.
3) Stretch yourself thoroughly.
4) Lean back and stare at the ceiling.
5) Respond to any and all questions with "That's cool" or "Whatever", with no indication of an actual answer in your tone.

Congratulations, you have no achieved maximum chill, drugs be damned.