Plan a debriefing session
Always debrief your sales calls. This is the only way you can get better. Ask yourself:
Source: Sales consultant/author Jill Konrath
-- What went well?
-- Where did I run into problems?
-- And what could I do next time to get even better results?
This is absolutely the only way you will improve. Sales is a grand experiment -- customers change, markets change, your offerings change, and so does your knowledge base. Unless you're continually learning, you're losing ground.