Advanced Two-Step Prompting Strategy for Nano Banana Pro Thumbnails

Prompt

This actually has one more devious way to use it.  Have it organize things systematically once → then have it produce the deliverable or dig deeper into the key points based on that Just doing this alone makes the quality of the output completely different.  The reason is that if you first make the AI create a blueprint in its head, like “terms,” “criteria for judgment,” “things to avoid,” “templates,” and “priority order,”  then the next instructions will be generated along that blueprint, so the output stays consistent.  For example, if you want Nano Banana Pro to create a thumbnail,  1. First tell GPT-5.2: “Thoroughly research and systematize the best practices for prompts for creating thumbnails with Nano Banana Pro. Include common mistakes too.”  2. Then say: “Based on the current framework, create a prompt for making a YouTube thumbnail with Nano Banana Pro for the theme {argument name="テーマ" default="◯◯"}. The video content is something like this, and I want to include {argument name="文言" default="こういう文言"}.” and have it create the prompt while incorporating your own requirements.  Then take the finished prompt and put it into Nano Banana Pro. It becomes much easier to get the exact kind of output you want.  If you ask every time, “Just make it,” the AI will output something based on the mood of the moment, so the results will be hit or miss, but if you have it create a map first (the framework), it gets strong.  What’s more, this method works for everything: side hustle strategies, sales copy, video scripts, all of it. The versatility is insane.  Before having AI do the work, I really recommend having it organize how to create a good deliverable, and then thinking based on that.  By the way, the thumbnail we made this time was the third one. The first one was kind of meh, so after systematizing how to make an attractive YouTube thumbnail, I had it generate the prompt.