I am going to take ecstasy for the first time what should I do?

I'm going to a dj tiesto concert in 2 weeks and am planning on taking ecstasy for the first time. What should I do to prevent any bad things from happening other than not taking it?

: http://alcoholdrugstreatment.info/i-am-going-to-take-ecstasy-for-the-first-time-what-should-i-do