I signed up for Google Adwords a week ago, and it was nothing special: put in my website, confirmed my e-mail, etc. But I didn't set up a campaign, because I wasn't sure what I wanted yet.
A week passes by, and I get an email from Google:
"Thank you for creating an AdWords account! We've noticed that you haven't yet started running your ads on Google.
Don't miss out any longer on this powerful and effective advertising solution. Let Google AdWords drive more interested visitors to your website and bring you more customers for your business. We can get you started today!
In fact, we are so convinced that Google AdWords can help you grow your business, we're offering you $100 in free advertising. Test drive Google AdWords completely risk-free!"
So if you're just starting Adwords.. wait a week to set up your first campaign, and you can get a $100 coupon from Google!