Using the statistical methods shown above you can do some manual “winner” analysis such as form fill conversion rates. I’ve found that often time the most opens doesn’t mean the most form fills. It’s easy to get opens, or even clicks. Often times those form fills are people with a very specific pain points, and subject lines resonating with those pain points don’t tend to get opened by non-interested people.

Some instances sending emails right away isn’t best. You won’t know that until you challenge what you think you know.

Test all the things.