A crisis occurs in your story.  Doesn’t matter what kind of crisis; any crisis will do.  Obviously, that means there’s conflict occurring – but don’t stop at one conflict.  Dig a little deeper into the situation, and find at least 3 forms of conflict within this one event.

As an example, say one character is threatening another.  The obvious conflict here is one character vs. another.  But then there’s the threatened character’s response to account for – are anger and fear battling for dominance?  The desire to strike first vs. the fear of repercussion or vs. the desire to do the “right thing”?  What about other external factors?  Is another character pushing one of the others toward a certain decision, angling for a certain outcome?  Or is the threatener internally conflicted, too?  Or do the police get involved?  And are there legal considerations at odds with one another in this instance?

The more angles you have on any conflict you write about, the more depth you can put into it, the more you can make it count, the more your characters will come across as “real people”, and the more intriguing the events themselves will be.