Remove the email confirmation when making payments to clients, I've found my business has lost about 5-10% of revenue since transferring over from Mindbody due to this feature.

Having clients have to confirm via email the purchase of a gym towel for $15 is frustrating, coming from Mindbody where they deemed once someone has put a payment method into the system it's enough to make transactions without confirmation.

Also with memberships when I have to suspend someone's membership for a week, they have to activate their membership again via email which can also lead to a loss of revenue.