Grant describes givers, takers and matchers. Givers can be the most successful when they help generously but protect their time and avoid being exploited.
When to use it
Use it to shape how you offer help across your network without burning out.
How to apply it
Notice whether you tend to give, take or keep score.
Look for help you can give that costs you little but matters to the other person.
Set boundaries on when and how much help you offer.
Be more cautious with people who consistently take without giving.
Ask for help yourself too, so relationships stay two-way.
Tip: Grant's research found givers at both the bottom and the top of success measures; the difference is boundaries.