Keep your these status on 100% that will definitely improve your sales and rank.
Simply follow these rules.
Respond quickly as you get any massage reply quickly even if you get orders reply on your orders quickly it will make your response rate to 100%
for more :http://blog.fiverr.com/response-time-rate-faq/?utm_source=nt_ct&utm_term=n807
Orders completed without cancellations. Order completion impacts your business.
For more :http://blog.fiverr.com/order-completion-cancellations/
3) Deliver on time
Always try to deliver within a day
for more :http://blog.fiverr.com/avoiding-late-deliveries/