A problem I’ve been coming across a lot recently when reading and critiquing on various writing workshops is the writer using his knowledge of future story events to guide present ones.
This is a fairly simple thing to fix, the problem is more in trying to convince the writer they are in fact doing this. It’s one of those things where if the person isn’t aware they’re doing it, proving it to them can be very difficult. They just can't see it.
The reason this is something to be aware of is because misusing that knowledge can make the story lose credibility. If a character just happens to go to the right place at the right time, or if they assume or guess or hope for the best — and luckily everything works out in a way that's very convenient for the story, it will feel contrived and fake. Here's an example of what I mean: