1) Sleep a day long in "yoga" position
2) Puke like hell( If its not working, drink again)
3) Piss harder
4) Use filthy language for someone doing no mistake.(feel comfortable with your own database)
5) Make yourselves home wherever you go..

This is the most effective way, as per a study conducted among the 'best knowns' in the field for years.

As someone says "you can't teach experience"

---If you can't CONVINCE 'em, CONFUSE 'em!!!