The Technique: Mood – How does your character see a scene? In other words, what the character sees is more important than what you as the writer want to describe.
Your scene might take place in an empty office, a noisy factory, a darkened bedroom, a rainy alley, a foggy beach, a windswept blizzard… or anywhere imaginable. But that’s the setting. What's important is how this setting is perceived by your character.
Getting Started: Choosing the woman in the rainy street, use her point of view to describe the mood of the scene.
A rainy alley may lead to the apartment in which she'll be joining her new love for a romantic dinner. Or it may be the rendezvous with her blackmailer. Same setting, different moods!
Hint: The mood changes with the feelings of the character and that changes what she is actually seeing.
For example, if she is looking forward to being with her new lover, she is so lost in exciting and passionate thoughts, she might not even notice the cars or any other people.
On the other hand, if she is meeting a blackmailer, she might notice every last detail. Who and what she sees affect her mood and her perception of the setting. You have 20 minutes for this exercise!