The best thing to do when your trying to build up a book of business with your new aesthetics career is to offer a package of treatments to your clients. If a client arrives and they may complain of cellulite on their legs and you offer a package deal of 9 treatments and then they use 7 treatments of that package that removed their cellulite, then they have 2 treatments left for another area and they will of course want to buy another package for that new area.