Pick the right offer
The best 7-email sequences in the world won't save a bad offer. Before you write a word, vet the offer against three criteria: it converts on cold traffic, the sales page does some of the work for you, and the commission is high enough that one sale per 100 subscribers is profitable.
I use a quick scoring sheet — affiliate page quality (1-10), commission per sale, refund rate, and existing reviews. Anything below a 21/30 total, I skip.
If the affiliate sales page hides the price or the refund policy, it's a no. Sequences that lead to friction-heavy pages convert poorly no matter how well-written the emails are.