I have never used adwords until this week. I had a $100 coupon so I made two ads for two sites. One ran for two days the other for one. And today I get an email from them saying I violated their terms of service. I still have AdSense though. I don't know what I did.

You might have voilated landing page policy or advertising policy.

This is happened me too.

If you use adwords you may have truble with it coupones, because since last week they blocking all new account's with coupones... Try to use with real money, o register new domain and redirect to real site. To advertise on new domain name.

adsense with adwords is arbitrage , and not allowed in adwords ,,, thats the problem

They are making a lot of problem with the coupons these days...
I got several accounts banned while using coupons.