Often, what happens is that we run into unscrupulous Internet Marketers (IMs) who have less-than altruistic intentions of extracting money from you rather than helping you to make it. However, this isn't something new. People have been falling for networking marketing, pyramid schemes, and affiliate marketing scams since before the start of the net.
Don't sacrifice morals for a quick buck — At the outset, you'll want to do all sorts of things to make money online, but don't sacrifice your morals for a quick buck. Not only will you put people off, but you'll lose Google's trust. You also shouldn't concern yourself with things like Adsense or other ads on a blog before you have around 100,000 visitors per day. Yes, per day. 
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
If you are great at typing fast and transcribing, this is for you! By signing up at Transcribe Me, you get to work on tasks where you are expected to turn audios and videos into text form. All that you need is a computer connected to the internet and your transcription skills. Tracking of your weekly work is easy and in real-time. You can request payment at anytime as long as you have a minimum balance of $20. Payments are fast and secure way through PayPal every Thursday before 9 a.m. EST.