How to get a $100 Adwords coupon.
1. Sign up for Google Adwords, Google Apps, Google Webmaster Central, Google Engage, Google Business (on Maps?), anything related to making money and advertising that's by Google.
2. Wait, wait, wait.
3. Read every promotional email and letter, including stuff sent to you in irl mail.
4. Look for coupons.
Google Engage liek a pro.
1. Sign up for Google Engage
2. Get coupons liek crazy.
Try this too, for $75. https://services.google.com/fb/forms/adwordscoupon/