faucets - Complete waste of time if you can work for more than a buck/hour
 web mining or cloud mining - most of them are scam
 hardware mining - need serious $$$$
 pools - need hardware = $$$$
 Solving captcha - available for fiat and bitcoin. You will earn maximum a buck/hour
 Watching videos - maximum a buck/hour
 Doing tasks - maximum a buck/hour
 Online jobs - skill depending, freelancer.com is for you or fiverr.com
 Trading - skill depending could make you money
 Investing etc etc...