Preparation, before anything
Every engagement begins with a walkthrough and a punch list: the eleven small works that return more than they cost, in order. Sometimes it is paint and hardware; sometimes it is emptying two rooms entirely. My stager has dressed every launch I have run for six years, and her furniture stays until closing.
Nothing goes to market with an apology attached. If a house needs three weeks, it gets three weeks. The market forgives a late launch and never forgives a weak one.