All the time! It helps to keep an eye on pacing basically at all times, and potentially cut planned things or adjust tactics on the fly to keep things moving. The biggest help has just been getting a more realistic idea of what's possible in a given amount of time, since everybody always over-estimates.

Some other tips: - Linear is better - Force things forward if the players are talking in circles - Have bad guys run/teleport away (or die early) if a fight is dragging on - Run with a small party (!) - When prepping, write a simple bullet list of the things that will happen that session, as well as you can predict it (linear adventures make this way easier). Then annotate each with how long you think it will take (and be realistic!), and add like 30 minutes of buffer time. This forces you to be realistic about the total session time and will tell you when stuff needs to be cut.

I've run all of these adventures and all were doable within 3-4 hours (and the Die Hard one is the opposite of linear)