Ask for pre-orders. In my experience I've found a substantial difference between "yeah, that sounds great I'd probably buy it" and... "here is my credit card".

Ask for pre-orders. In my experience I've found a substantial difference between "yeah, that sounds great I'd probably buy it" and... "here is my credit card". You'll find that even if you collect a large list of emails from people that said they would buy your product, when it is time to ask them to make the purchase the majority of them will come up with objections and reasons why now is not the right time. With pre-orders you have people that have given the ultimate commitment and you can offer them a discount and/or the ability to help shape the product through it's development. A simple billing page with something like Stripe checkout (https://stripe.com/docs/checkout https://stripe.com/docs/checkout) will help you filter out the tire kickers and attract people with a burning need for your product/service.