A hundred bucks, every three days, that's $12,000 a year. And that's just entry level. If you're really serious about this, why limit yourself to one sperm bank? You can hit as many as you want, multiplying your yearly haul with each one. The "Open ID" method specifies that you're limited to two pregnancies per state. But they distribute your sample for you, so assuming you don't mind having a brood of 100 children scattered across America, you're literally sitting on a potential $50,000 at this moment.

And they smile when you give it to them. And they keep it in drinking glass.

Even if you don't go "Open ID," your earning potential is only limited by your ability to deliver the goods. The sperm count tends to decrease with the volume, but your guys can handle a few workouts a day, right?

Ladies, we're not leaving you out of this one. You can donate eggs and--get this--you can wind up with $5,000 or more per cycle.

There's even a book on the subject by long-time busker Johnnie Mac, covering all the basics from the choicest locations to where to put your tip cup. Mac spent almost 20 years as a street musician and says he was, "making a fortune... in fact, more than triple what I was making in the job I left behind."

And there's plenty of room for advancement. The Blue Man Group, Jimmy Buffet, Pierce Brosnan, George Burns, Bob Hope, Jewel, Jimmy Page, Penn and Teller, Rod Stewart, Simon and Garfunkel, Bob Dylan and Robin Williams all started their entertainment careers on the streets.

This is none of the people listed above but he's probably loaded.

Sure those people all had talent, but you can also make money miming, fortune telling and standing totally still while covered in silver paint (though we're guessing that last one involves lots of smart-ass kids walking by and punching you in the nuts).

Street performances are perfectly legal in most places as long as they don't interfere with traffic and business. But you do have to deal with the other buskers who are trying to horn in on your racket. After all, your sweet saxophone playing isn't going to get you any cash if there's a dude noisily plucking at his banjo five feet away, drowning you out. Luckily there's a sort of "Busker Code" that street entertainers follow which basically states, "I got to this corner first, and if you try and set up shop here, I'll stab you."

Potential Income:

$50,000 a year (if you survive).

The key to science is trial and error. This occupation offers offers the excited opportunity to get paid to be one of the two.

Anyone can do it and, if you get involved in enough studies, man can it add up. For instance here's one that pays up to $1,500 for just two days of your time (granted, you have to be in chronic pain to qualify, but who isn't?) or you could get paid $15 an hour to be a test patient for medical students to poke at. And best of all, it's perfectly safe!

"Open big. Good, now swallow this tree frog."

Okay, that's a lie. A couple of years ago 11 people got tuberculosis after participating in a study that was apparently trying to find out what happens when you stick 11 healthy people in the same room with one guy who has tuberculosis.

Sure, that sounds horrifying. But we know at least one of their symptoms was prominent swelling. Of their wallets.

"Worth it!"

But more lucrative is all the perfectly good s**t people throw away just to get it out of the house. Entire working computers wind up in the trash (after the owners upgraded) along with other electronics, furniture, all sorts of stuff you can sell or use.

Dumpster divers, like buskers, have a culture of their own, complete with rules and even forums where tips and secrets can be traded (the Dumpster World forums are members only, so secrets aren't given away and businesses don't get wind of what's going on behind their shops).

There are plenty of articles out there on the subject if you're looking to get your foot in the door. Remember: One man's discarded vibrator is another's Christmas shopping!