Hi everyone, noob here and I've been reading post and other info for a long time and its time to take action. I have several ideas on setting up an information(niche) site with lots of free content and monetizing it after it has ranked because of its useful content. My question is specifically is what determines a profitable niche? Or what are the best ways to measure possibility or income? Maybe some of you guys with experience can enlighten a me, also I have used Market Samuri and I've checked spyfu, are there good places to start?