Realize that using a relationship power is often a "long game" in that for it to truly take effect it may take a long period. That is$,$ you cannot develop meaningful levels of trust immediately, nor are you going to invoke a strong series of likes just by saying hi and appearing pleasant. These things help form an initial impression of trust, but the other party will be looking at your behavior in every situation $($not just in negotiations$)$ to confirm whether those initial impressions are correct or whether they need to be updated. Knowing this, how can you develop a long$-$term plan toward someone you know you are going to have to negotiate with in the future $($e$.$g$.,$ a supervisor, an important coworker, or a parent$)?$