Two opposite extremes -
In the Redbrand Hideout, I lost my nerve and all but guided my players to Glasstaff and also the magic sword. I should have stayed stronger and let them work things out on their own.
Later they went to the orcs of Wyvern Tor. After feeling that some earlier encounters had gotten bogged down by the grid, I decided to run this theater of the mind. But, I was out of practice, and did a lousy job of describing the world to the players. This led to them approaching it in a very straightforward way, and a TPK.