Move her as slow as possible, once you begin to move put the engine in neutral, if backing in, turn around to face the direction of travel, have all lines cleated and free, use your engine as a break, I prefer to move the boat at a speed no faster than two people sauntering along talking. Line the boat up a good distance from the well or dock or pier and plan how the wind will effect the boat's course, then compensate. If it looks like things are going bad, stop back up and try again. You don't win prizes for being the fastest guy to dock his boat. You can usually spot those winners by the scrapes and scratches on their hulls and/or their bent bow pulpits. Have fun and stay cool.