Several tools can aid in prioritizing content: 1. A/B Testing: Platforms like Mailchimp and Constant Contact offer A/B testing features to help identify the most effective content placement. 2. Heatmaps: Tools like Hotjar provide heatmaps that show where recipients are clicking and spending the most time. 3. Automation: Use email automation software to segment your audience and tailor content based on their behavior and preferences.