Take a step back and think about your products or services, and see how you can create different offers, packages or services to enhance the ability first to give value, and second to help your bottom line. Take for example a struggling Dentist sees that someone would benefit from a new night guard or retainer. You could take a $150 teeth cleaning up to $500 if they agreed to pay the additional $350 for the retainer.
Here's another example. I was getting some touch-up body work done on my car. The professional looked at the car and could see the same damage. Instead of offering to buff out any scratches for more money, I had to ask him for additional services. If you're the professional, I shouldn't have to wait for additional services. Offer your expert opinion to help them out which may include an upsell for your business.