As the question is asking for efectiveness the most effective way to optimize your time at work is keeping the chatting and hanging out with your coworkers at a minimum possible, taking short lunch breaks and being focused while working are examples of being effective at work.
<h2>Answer: Pick the mood you want to evoke. This is the feeling or emotion you want to give to your readers, and what all the elements in your short story will work together to achieve ^^</h2><h2 />