I learned this the hard way a couple of campaigns ago, you cannot ask the players what they do next and then spend 2+ hours waiting for an actual response. You will waste everyone's time. This is when your preparation comes into play. At that point LEAD them.
By the same token when the players are on the move, the best thing to do is get out of the way and "see with them" where it leads. This is where your preparation also pays off - improvisation is 90% preparation couched to look like you just thought that up.
That's great advice, yes (sorry can't XP!).
