“Don’t let your imagination and enthusiasm be dampened by organizational politics or institutional caution.”
This is from a white paper on guerrilla social media strategy by Colin McKay (shout out to Mads for the link), but I think it's applicable FAR outside social media strategy. Every organization has institutional resistance to change. EVERY organization. In some places, it's greater than in others. But every organization has at least one person who fears change. And most have a LOT more than one. If you are the change agent in your organization (and the fact that you're reading this means there's a better than average chance you are), don't let the forces of "we have always done it that way" steal your thunder.
So Fellow Change Agents, how to you keep your spark in the face of "no"?