You can try to earn more revenue from your blog by showing Amazon affiliate marketing ads. Simply sign up as an Amazon Associate at Amazon .com, have your account approved & start selling items from your blog. You receive a 4% referral commission for every product sold using your referral link. It does not seem like much but when shoppers frequent your blog then it will all add up to a significant amount. After referring 7 more items than your referral commission shall be increased to 6%. More about Amazon.com.