The 30-second Gemini prompt that tells you the right sample size before you launch any AB test, plus the formula behind it and the failure modes it prevents.
Seventh Sense, Klaviyo Smart Send, and the other AI send-time tools all need thousands of engaged subscribers before they get useful. Here's what to do in the meantime — 5 practical methods that work on lists under 2,000, with the prompts and Excel formulas I use to find them.
Most LTV models are either too simple (AOV x N) or need a data team and a Python notebook. This is the 5-input spreadsheet model I have used across DTC, SaaS, and subscription businesses since 2019 — with the exact ChatGPT prompt that builds a custom version for your business in under two minutes.
A practical walkthrough of using OpenAI Operator to crawl 20 competitor landing pages, extract positioning patterns, and turn raw screenshots into a positioning map — no code, no scraped JSON, just a browser agent and a well-built prompt.
