Don't expect something for nothing. Asking for favours from people you don't know just dosen't work. Be prepared don't waste peoples time.

Take notes and follow advice when you're meeting with people who are more successful than you are. Ask people who meet with you whether they thought the meeting was worth their time.

Only ask for referrals if they think it was. Don't go with a hunter mindset, always ready to be giving first.

Always introduce your colleagues to someone who already knows you and it is the golden words you speak about other person leaves a mark that won't fade away with time and when it's time to give back that same person will refer you with confidence with BAG FULL OF REFRENCES

Always have an engaging conversation with new people during a convention or conference.
You have 20 seconds to introduce yourself and in those twenty seconds you have to leave a mark of your personality.
And once a meeting or convention is over those well spoken words will always attract his attention when meeting twice after sometime.

Always dressed smartly as first impression is the last impression.