
1. Appropriate attire is always important. When you're meeting with world leaders forego the painted-on muscle t-shirt and wrap around sunglasses in favour of something classier, such as the classic tuxedo t-shirt and monacle look favoured by globetrotting superstars such as myself and the aptly named Harlem Globetrotters.
2. Know your strengths and exploit them: If you're a musician then make sure to discuss economic policy with someone who has a phd in their field and years of experience. They will definitely take you seriously and there's no way they'll make obvious comments like "Shouldn't you be making albums right now?"