I don’t mean to be rude but “selling things on craigslist” shouldn’t be on the list, I mean that’s like saying to get rich you can just sell all the expensive stuff you have laying around from being rich already. Maybe steal a bunch of bbq’s and sell them on craigslist might apply. Also I don’t see how “my cousin has a job” is a vaild way to make 100 really quick in a day… I have a job too, is that some secret trick, getting a job? a good way to make 100 a day is selling plasma and sperm for girls eggs can get you several 1000. or just find some people that look like they have money and scam them.

Since I do not live in the U.S., I would have to get paid by check or gift certificate. Obviously only getting paid in gift certificates isn’t that great, so that leaves the check. However, checks are not used here in Sweden at all basically, so cashing one comes with huge fees, I think maybe 30-40USD for a check. So my question is, can you choose to “save up” the money you make at Amazon and only get a check sent when you want to, or is it automatically sent at certain amount? I know Adsense has/had a feature that let you “block” payments until you released them. If Amazon has a feature like that, it’d make the check-fee less of a problem.
Fixed-price advertising is when you set a flat fee for your ads, a setup that tends to attract smaller advertisers with a very specific budget. I’d also recommend BuySellAds for this due their extensive range of tools that can help the smaller website (those with less than 100,000 impressions) sell their inventory directly to advertisers. Fixed pricing = clear expectations.
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One of the ways I’ve also been able to make good money with Amazon is to automatically populate information from a WordPress plugin that I had developed based on the needs I had for building Amazon centric websites. The result was EasyAzon. The plugin allows you to insert information and affiliate links to Amazon in a much faster way than creating the links yourself by hand from Online Shopping for Electronics, Apparel, Computers, Books, DVDs & more.
Tutor kids online: If you are 15 years or older and have deep knowledge of a particular subject, you can sign up to tutor kids online. Each site has a different payment model for its tutors. At Enroll.com, for example, tutors provide the first two sessions free of charge and then payment will depend on feedback, subject matter, and credentials.  The following are a few popular online tutoring sites: 
Español: hacer dinero fácilmente, para niños, Italiano: Far Soldi Facilmente da Bambini, Português: Ganhar Dinheiro Facilmente (Para Crianças), Русский: легко заработать деньги (для детей), Deutsch: Als Kind einfach Geld verdienen, Français: gagner de l'argent facilement (pour les enfants), Bahasa Indonesia: Menghasilkan Uang dengan Mudah (untuk Anak‐Anak), العربية: الحصول على الأموال للأطفال, 中文: 轻松赚钱(孩子篇), ไทย: หาเงินง่ายๆ (สำหรับเด็ก), Nederlands: Makkelijk geld verdienen (voor kids), Tiếng Việt: Kiếm tiền dễ dàng (dành cho thiếu niên)