Hi there,
I'm using secret technic on 4 Adsense site for 5 months. for $30-$50/day, all things you need are get enough traffic to get 20 clicks per day (CTR 1-1.5% for safety).
I can send you a technic with small price (and $500 can return in a week as ROI of this).
If you want to try before decide, give me your url, tell me number of page views per day, i'm sure you will surprise.