Several tools can assist in optimizing queries, including: 1. Database Management Systems: Tools like MySQL, PostgreSQL, and SQL Server offer features for query optimization. 2. CRM Software: Customer Relationship Management (CRM) software like Salesforce or HubSpot can help manage and segment your audience more efficiently. 3. Email Marketing Platforms: Platforms such as Mailchimp, SendGrid, or Constant Contact provide built-in features for segmenting and targeting your audience.