Adsenses and Conversion rate optimization needed for coupon site

hello, I have my coupon site with 20-30k/month organic traffic. i have both affiliate sales as well as adsense for revenue. I am getting average 200 clicks/day for affiliate links without any conversion or very low conversion rate and this is happening from last 2 months. i want to convert affiliate link clicks to sales and want to optimize the conversion rate. And I am getting average 50 clicks/day @ adsense with very low rpm and earning. want to optimize adsense earning.