All of them works, but you have to persistent and keep going no matter what.
I get around $100/monthly dividends
Adsense+YouTube $250~
POD - $90
ETSY $150
eBay $300
Freelancing: web design for a friend that owns a web hosting company in UK - $0 ~ $300 depends.
I live in Japan, so my cost of life is pretty low if I earn in $$$.
It's not much, but if I keep going I believe I can quit my 8-19 job soon.
Sell stuff from Argentina on eBay.
Offer english class maybe?