A hack is a clever solution, strategy or technique for managing your time better, or doing some activities more efficiently, or getting better results.
Social hacks are techniques that allow us to be more successful in a social context, communicate better with people, have a better relationship with them etc.
For example, bringing up a topic you know someone is interested in is a simple and common social hack that allows you to strike up a conversation with that person and have good interaction with them.
Of course, social hacks, like almost anything else in life, can be used honestly or dishonestly, for positive or negative purposes.
So, what are your favourite – simple or unusual – social hacks?