Many folks confuse that great leadership is mostly about vision and rallying troops to embrace the vision. While there isn't anything wrong with being a visionary, in reality though a large success is built on a series of many small things and the knowledge of those small things. Attention to (excessive) detail if you will.
Worth quoting a story about Gen Colin Powell that I read somewhere. When Powell was in the Army and responsible for inspecting the barracks, he'd check the toilets — not to see if they were clean. "Was there a shortage of toilet paper, were any mirrors cracked, were there any missing showerheads? Finding any of these situations immediately told me one of several things — the unit is running short on upkeep money, no one is checking up on these things to get them fixed, or the troops are not being supervised well enough. Find out which and fix it."