With that goal in mind the websites listed below are a couple other sites you might find useful.
We’re not affiliated with any of these sites, but anything listed here has received my personal seal of approval

Marketing Experiments is run by a small group of exceptional marketers. The site was originally flagshipped by a brilliant marketing psychologist, Dr. Flint McGlaughlin.
Marketing Experiments, in conjunction with Marketing Sherpa has
- Research and marketing case studies (with actual numbers)
- Insightful videos (copywriting and conversion optimizing)
- Results from A/B split tests (spanning some 20 years)
.