If you want to make better marketing decisions and struggle with a blank slate, listen to this. Make constraints. Put in a guardrails. Sometimes you will have plenty already in place, like budget, deadlines, or what's technically possible. But even without obvious constraints like those, you can force yourself to have some to help guide the decision making process. Guardrails can help move you from being stuck on making decisions because of the infinite possibilities of channels and campaigns. This is also why so often the answer to many marketing strategy questions here are "it depends" or "tell me more about X."