What would you do ( EVEN if it is boring as hell or monotonous ) with 320 labor hours per month to yield the highest ROI - not ppc, lets say organic traffic only. Review pages built for every popular aff offer? Not sure what I should do with the labor exactly. What would you do To yield the highest ROI?
Article marketing. You could write a pile of articles with that time, and the traffic you would get if it were done right would be huge!
there are loads of start-ups promoted in such forums as this one who offer great deals for those who submit to their ideas - new directories, new affiliate programs...a daily search of the forum will find you great business opportunities to earn you money and raise your search engine position.