Too many info-marketers assume the sales process is complete when they get a new customer. They immediately flip to fulfillment and training mode. However, after he sale is when you need to ramp-up the sale.
Michael Rozbruch recorded a sales video to get his clients excited after purchasing his program. It resells his new member on the program, reminds them why they invested in the program, and shows them exactly how to get started.
For your new member welcome, include a video and a letter that (1) Resells your client the on the program they purchased; (2) Tells a story or stories about clients who joined the program and got results quickly; (3) Ties those stories to core values of the tribe; and (4) Gives specific instructions on how to quickly get started and generate results.