Looking at a situation that has already occurred and asking yourself, “What could have happened?” can boost creativity for short periods of time.

According to an analysis by Jeremy Dean:

• Analytical problems are best tackled with thinking about what could have been

Creating “psychological” distance may be useful for breaking through a creative block.

Try to imagine your creative task as being disconnected and distant from your current position/location - this may make the problem more accessible and can encourage higher level thinking.

• Role mismatch.
• Too much/too narrow end-goal restriction. 
• Strict ration of resources, including insufficient time.
• Lack of group diversity produces less creative results.
• Discouragement. Too much criticism, endless evaluation...

Instead of thinking of a cut-and-dry end goal to certain situations, creative people sit back and examine the problem in different ways before beginning to work.

If you find yourself stagnating by focusing on generic problems, try to re-conceptualize the problem by focusing on a more...

From a new study on creativity in the workplace:

Creativity increased when both positive and negative emotions were running high. Next time you’re in a strong emotional state, try to sit down and focus that energy on creating something.

Research suggests placing self-imposed limitations can boost creativity. 

It forces your brain to come up with creative solutions to finish a project around the parameters you’ve set.