Just to share a related experience: We recently set up a free diet program that also involved behavioral change. The conversion rate on the site in terms of s

Just to share a related experience: We recently set up a free diet program that also involved behavioral change. The conversion rate on the site in terms of signups were great (about 70% actually). We were also tracking a couple of products that were integral with the diet that we referred our customers to and the sales weren't quite close to matching the numbers we were seeing. Long story short, we tried asking for phone numbers, and those who provided were given calls a couple of days after signing up, and the response rate has shot up exponentially, including sales of the products. The people didn't mind the calls either, even after we asked if we could call them once a week to follow up on progress. Of course, these were personal calls, not automated ones. Email reminders are also automated, yet you are more likely to miss it because we're not glued to our monitors 24/7. A phonecall however is more likely to get your attention. There's been many times I've missed or forgotten something that could have been prevented with a short call or text message.