Service-Oriented Computing (SOC) allows developers to structure applications as a set of reusable services. Web Services expose their functionality by using Web Service Description Language (WSDL). We found that there is a high correlation between well-known object-oriented metrics taken in the code implementing services and the occurrences of 'anti-patterns' in their WSDLs. We show that some simple refactorings performed early when developing Web Services can greatly improve the quality of WSDL documents. Then, the contribution of this work is a practical approach to guide practitioners in obtaining better WSDL designs that aligns with the technologies and techniques commonly used in the industry for building services.