There are many factors that go into making that kind of money. My best advice would be to read everything you can from DP'ers on this site, and everything you can on the web. This forum alone will give you lots of hints, ideas and strategies to get you going. $100 a day will take a long time to establish, and patience is a virtue. Take your time to research before you dive in.
its a dream for many to make 100 bucks a day. that would mean youre able to quit your job right? hehe.. i agree with W3bmaster that you should take it gradualy. Aim for only 5 bucks a day even that is hard for at least me. I started with adsense less than a week ago . i am not that skilled in marketing ..i run some simple blogs and trade and buy links to them here on DP . first week income from adsense : 123 bucks thats might sound like a lot for a rookie ,but the truth is i also spent like 200$ on buying links .
Read a lot on the forums, SEARCH - don't go starting another thread that's been asked 100 times already. Get traffic, and make good sites - not MFA.
I have 700 absolute unique visitor per day and $2 a day is also way too hard for me so for you to make $100 a day..well, may take a while LOl..
its a good dream. think about this. a website with page that pple generate. like Digital point. i think one like hi5 too is a good example. start a website that pple wil add stuff etc, have more than 1000 pages and am sure there is a way its possible. have a unique idea. there are many niches out there. choose a non competitve one and excel. buy traffic. build links. if you have the resources, its not just a dream. its a reality. good ride buddy!!
Build few sites. Add new content on regular bases. Build back links. Try to generate a lot of traffic. Traffic =$$$
Get traffic and optimize for a good keyword on adsense (aim for $1 a click) One time i made $1.73 on a click about Logo design, experiment