You set yourself up in the passing lane of the other team.

They are not sneaking one by you on your watch.  If they are going to take a last minute shot it's going to be a shot that your goalie can see clearly and cleanly.

You only concern yourself with making sure that they don't move the puck around enough to confuse your goalie and team to get off a shot that could go in easily.

The playmaker has the puck and is looking for his options.

You close down that passing lane.

The player looks stressed, will he go for the shot?

He looks at the goal like he is going to shoot and for a second you hesitate about your decision and take a step towards the shooting lane.

Suddenly the player shifts and looks like hes going for a pass, but you think you can disrupt it!

Dive feet first to disrupt the pass

Or

Put your stick out and try to tip it into the neutral zone