Final answer:
The guideline for creating effective podcasts is to pay close attention to previews, transitions, and reviews.
Step-by-step explanation:
The guideline for creating effective podcasts is to pay close attention to previews, transitions, and reviews. This means that when creating a podcast, you should consider how you introduce the topic, transition between different segments or ideas, and summarize or review the main points. By doing so, you can create a more engaging and coherent podcast for your audience.