How to begin a copywriting job: Start at the end!

That's right: Start at the end!

I got an inquiry about writing copy for a website:

So far I like your style and clear understanding that copy [and visual support] is all about clicking the Buy button . I would like to get started in a modest way so I can get to know how you work and build from there. - Suggestions for how we might kick this off

I wrote back:

Thanks for the vote of confidence. Why don't we start at the end:
What do you want my copy to do? Get leads? Orders? Join a list?.....
From a website? By email?

Let's decide where we're going. Then we can compare routes to get there.

Start at the end!