What is the most logical next event?

How to write slogans
Understand the brand.
Before you actually write anything down, it's best to research the brand you are writing the slogan for. Get information from the website, ask the employees of the company for history on the brand, how long the company has been around, what has been tried before, etc.
You want to develop an intimate knowledge on the company and brand. Figure out who the target demographic is, what's the voice and tone of the company, and what the company is selling.