To improve your sales efficiency ratio, there are several strategies to consider, such as increasing lead quality, optimizing your sales process, boosting customer retention, and analyzing and adjusting your sales and marketing budget. To increase lead quality, focus on attracting and nurturing leads that are more likely to convert into customers. To optimize your sales process, streamline and automate it to reduce friction and increase conversion rates. Utilize tools such as CRM, email marketing, sales scripts, and sales coaching to enhance your sales performance and productivity. To boost customer retention, provide excellent customer service, offer incentives and discounts, and create loyalty programs. Lastly, track and measure your sales and marketing expenses and revenue, and compare them to your SER goals. Invest more in the channels and campaigns that are generating the highest SER, and cut or optimize the ones that are not.