Choice-shaping is about influencing how people perceive their alternatives. Think hard about how to make it hard to say no. Sometimes choices are best posed broadly, at other times more narrowly. If you’re asking someone to support something that could be seen as setting an undesirable precedent, it might best be framed as a highly circumscribed, isolated situation independent of other decisions. Other choices might be better situated within the context of a higher-level set of issues.