Research individual companies in your desired niche: If possible, it’s always better to become an affiliate directly with a company (if they have an internal affiliate program), as no one else will be dipping into your commission rate. This is the preferred route for most of the prominent affiliate marketers, including Pat Flynn. Unfortunately, it’s also the most work, as you’ll have to do the research yourself to see who offers programs (they’re usually listed in the website footer).
After all the work you've put into starting your business, it's going to feel awesome to actually see your idea come to life. But keep in mind, it takes a village to create a product. If you want to make an app and you're not an engineer, you will need to reach out to a technical person. Or if you need to mass-produce an item, you will have to team up with a manufacturer.
Third, you can try out LivePlan’s Pitch feature. Just answer the questions it asks and click “publish,” and you’ll have a professionally-designed, one-page business plan that is easy to share and covers everything an investor wants to know. Another good option is to follow my colleague Caroline Cummings’ advice and write your business plan like it’s a series of tweets (seriously, it works).
Another option is to open a franchise of an established company. The concept, brand following and business model are already in place; all you need is a good location and the means to fund your operation. Regardless of which option you choose, it's vital to understand the reasoning behind your idea. Stephanie Desaulniers, director of operations and women's business programs at Covation Center, cautions entrepreneurs from writing a business plan or worrying about a business name before nailing down the idea's value.
Teaching and tutoring English as a second language is a great way to make money online, not to mention open some doors for you to travel the world if you'd like. While full ESL (English as a Second Language) accreditation is recommended, as long as you’re a native speaker and have the ability to teach, there are people in countries such as Hong Kong or the UAE who are willing to pay upwards of $25/hr for you to tutor them English via Skype. Check out Indeed, Learn4Good and Remote.co for remote english tutoring jobs or sign up on a specialized site like VerbalPlanet or Chegg Tutors.
Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
Then don’t sell YOUR product or skills for $5. Other people, your competitors, are allowed to do whatever they want. If someone makes a product and markets it for $5, while you make a product that YOU consider to be much more valued and market it for $100, the consumer still has the power of deciding what they would rather spend their money on. I’ve worked in the culinary industry for 10+ years and the saying I’ve always heard is that if you can’t handle the heat, then get out of the kitchen. Anyone can tell you if something tastes good or bad, but that doesn’t mean they can create high quality meals like I can. That being said…
Many gymnasiums will trade membership and often a bit more for a person willing and able to teach an exercise class. You can also find people who don’t want to go to a gym and train them at home as a personal trainer. If you’re in good shape, this is a great opportunity to earn some extra money, plus it can often lead to additional income with one-on-one instruction opportunities.
Get samples. When you first start out as a freelance writer, it can be hard to get work without any published samples. However, it is possible to get quality samples if you are willing to do some writing for free. First, you can publish content on your own blog or website. Also, you can write guest posts for someone else’s blog. Finally, you can write blog posts for free in exchange for a byline.
Here in Australia you will need a “responsible service of alcohol” certificate, this may just blow your $100 budget but not by much. The others look like they would meet the under $100 startup benchmark. So to anyone complaining that they can’t afford to start their own business they have no excuse. However, the amount of TIME that needs to be invested in running a business is substantial.
When was the last time you went to a new restaurant without looking it up online beforehand? Or bought a product that didn’t have at least a few 5-star reviews? It seems like more and more our world is run on reviews. And you can make money online by writing them. Get started by creating accounts on sites like Vindale research, Software Judge, FameBit, CrowdTap, Influence Central, and Modern Mom. However, before you run off and start writing, be sure to check the small print on each of these sites. Writing reviews isn’t a huge source of guaranteed income and you want to make sure that it’s worth your time before you get going.
Get a credit line. It is not uncommon for most startup businesses to rely on a line of credit. The American Express Plum Card, for example, offers a 60-day term for payment rather than a typical 30-day term. Some banks or credit institutions offer credit designed to allow growth in the early stages of business. A word of caution: to keep from getting bogged down in debt when you are trying to expand a business, keep purchases to a minimum.
Fiverr is one of the biggest providers in the gig economy on the web and you can sell a wide variety of services and products through this medium. Do the research and find out what you can offer. However, keep in mind that like any other money-making task, it takes time to succeed here. And stellar reviews will help you generate more and more income over time.