Everyone is a person and treat them that way. Similarly, REACH THEM at that level. Be willing to work harder than anyone else (drive you to the airport!) Do your homework (I owe you homework on the vertical you suggested be #1). Ask everyone. Pitch everyone from their perspective. Practice often. Take feedback. Be open to the idea changing. Be infectuous about your ideas.

Secrets to Contact Strangers and Ask for Money – [From the Eyes of an Entrepreneur]