Hi there..desperate to make money? tried enough effort but still fail?
Well...try harder..remain in your niche. Get more reading materials, books related to your topics. Only then you will come out with more valuable and specialised content.
My advise is to ;
3. read more....
By the way i have a list of alternative besides adsense for you to explore.
7.Yahoo Publisher Network (only available in US)
Check it out..