This document outlines an influence model for influencing others without direct authority. The model focuses on understanding what's in it for them (WIIFT) and what's in it for me (WIIFM) in a given situation. By combining an understanding of WIIFT and WIIFM, one can influence outcomes without formal power. Key aspects to consider include interests, constraints, concerns, and currencies for both parties to find common ground and circumstances where influence may work. Mastering this model can increase one's influence and success.