it will take some time and hard work on your part. more importantly you have to have many visitors and/or multiple sites.
All u need is to make like at least 5 good sites and get some traffic like 30k uniques per all sites and u should make 100$ daily. Just one simple thing, its gonna be hard to make 5 good sites and have all that traffic everyday. But if u're planning to work for 8 hours everyday on it and u have some talent, u gonna make it. When? it counts all on u. People can't teach u how to make money, they just can give u some advice, but u have to do it by yourself that all job. U have to have some brains if u want to make good money with adsense, because its ain't easy and not every random guy can make even 5$ per day and u want to make 100$ per day, so u have to have some talents too.
I would recommend focusing on one site and one site only. Maybe 2, but one is better. If you don't have some crazy fresh new idea, just choose anything that you like and blog about it. While you blog, promote it any way you can. Link exchange, SEO and other techniques you can find, DP's marketing forum could help you. I think you will have more chance to get $100 per day if you focus on one site only every day, than building many sites and spreading (wasting?) your time and energy to several different sites
Your goal should start at $5 or #10 daily and work your way up. You need good content, tons of backlinks, traffic, and good ad placement.
Yea adsense is Great but its a marathon not a sprint. And it is No system that will give you riches overnight it takes some work but More importantly Being Consistent.
i got to $100+ about two years ago. it's really, really hard. lots of sleepless nights, lots of math... trial and error and trying to stay ahead. the best thing to do is read this board, cut your losses and man up to your own mistakes. for instance, i thought i knew it all, but i had to come back because of the new technology/social media/apps. if you want real advice... same as everyone else, there are no short cuts. no auto blogs (maybe if you have 1000+ but that's a lot for domain names). You have to write, you have to submit, you have to do PR... you have to monitor and analyze your stats.
i have 60 freaking blogs and most of them are PR2+ and still only getting $6-$10 a day from adsense $100/day ? maybe 5 yrs at least?
Conent is king. Build a few websites with a large quantity of QUALITY content and the traffic and earnings will be much easier to come by. In the meantime, I would suggest picking up another job because it does take time to become succesful with Adsense.