The key to the approach I use is changing the sales mentality that is often preached of aggressively closing, into one of aggressively caring. The service you are trying to sell is one of support after all, so how better to build your value continuously than setting that relationship up even before they purchase? The best way to demonstrate that care is to take your time to work through the key steps of the assessment and planning process, and make sure there is a follow up system in place that has been communicated to the potential client. I know this is unbilled time for the most part, but it just has to be looked at as your investment in securing a future sale, or at least retaining a gym member (who could lead to or refer a future sale).