This guide presents a data-driven email marketing strategy aimed at enhancing return on investment (ROI) through effective practices. It outlines twelve actionable strategies based on data from over 150,000 brands using Omnisend. The strategies include growing a high-quality email list, setting up essential automations, segmenting customers, and ensuring compliance with deliverability standards. Each strategy is detailed with practical tips, such as the importance of engaging subject lines and the optimal timing for sending emails. The guide emphasizes the significance of offering value in emails and utilizing omnichannel approaches to enhance engagement. It also discusses the necessity of monitoring performance metrics and conducting A/B testing to refine email campaigns. The document concludes by reinforcing the need for brands to adapt their email marketing efforts to meet customer needs and preferences, ensuring sustained engagement and improved financial returns.