Email subjects need to catch people’s attention. You need to appeal to their curiosity and ensure your subjects can pass spam filters so they get opened and read. You can accomplish this through five different product-selling tips. Show a sense of urgency, offer incentives, ask questions, solve problems, and include the word “you” often. For example you could include words such as, “Hurry in now; this sale ends soon!” or, “Doing yard work this weekend? Come in today for a great deal on a hedge trimmer!” Find out more here.