Testimonials statements of satisfaction from past customers are an excellent way of doing this. Great to meet you at ShopTalk conference.
Headlines need to grab attention in a relevant and meaningful way. Instead, you make the "next step" something trivial that indicates the prospect's receptiveness.
Using technical words that are relevant and recognisable to your contact will help to convey that you understand the issues and details from their perspective. Our customers hire us to restructure their supply chain to ensure just-in-time component delivery.
A good letter won't need it.
Now it's best to work on less than five seconds. Think about the language that your intended contact uses - for example, what newspaper are they are likely to read - this is your vocabulary guide. Mine are still ringing!
Often it's easier to decide on your headline after you've written the rest of the letter.