Law 13 of The 48 Laws of Power states that when asking for help, you should appeal to people's self-interest, not their gratitude or mercy. The idea is that people are more likely to help if they see a benefit for themselves. 

Here are some tips for applying Law 13:Find a benefit: Look for something in your request or alliance that will benefit the other person and emphasize it. 

Think from their perspective: Try to see the other person's needs and interests, and put aside your own feelings. 

Make it public: If possible, make it public that the other person is helping you.