...calmed down? Good.

Now make sure your goals are realistic. Don't make them sound impossible. Make sure you know how to achieve your goals. Otherwise the pressure will cook inside you and make you explode again.

How's this for an idea: look back at the study you read about. Then find material from the later years that reference this study, and observe all the progression in this area of research. You might be able to progress it even further with your own research - that's what a PhD student does.