As it has been said - making money is not easy. At least not until you have already made money. You just need ot find something you like. That will make it the work much more bearable. There are many free resources. Some of the methods required zero investment other than your time. Stavra
Better adsense or affiliate programmes ? Concerning adsense, I do not like surfers to leave my website for very little money ... so I do not use this ... Maybe I'm wrong ...
Affiliate marketing is the way to go. As mentioned you need a really good site to make it with adsense. With affiliate marketing you have many more options than adsense. Take a look at my signature. Stavra