Hey. Yes you can use just one website to promote multiple affiliate programs, but I’d say that your website should focus on just one niche. So you mention, SellHealth, that would lead me to believe your site is about health and fitness. I would then advise you to stick to that niche rather than promoting unrelated products like dog leashes and fashion accessories.
Take good pictures. Some of the options below don’t require you to actually take the picture and sell the product, but for the ones that do, make sure you take a clear picture that makes your product stand out from the others.  If you’re going to be taking a lot of pictures, set up a small “studio-like” area in your home with a backdrop and proper lighting to really make your pictures come across as professional. And of course, you’ll want a good camera too.

People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.
The Roof Maxx Dealership Opportunity is one of the most exciting low-cost, high profit margin opportunities available today. Roof Maxx gives property owners the ability to extend the life of their old roofs for up to 15 years for a fraction of the cost of a roof replacement. Roof Maxx is an all-natural roof treatment that’s quick, easy and clean to apply.
You'll also need ecommerce software, fulfillment software, worry about warehousing, customer service and refunds. But that's not all. You'll also need traffic. Think search engine optimization, Facebook ads, and other social media campaigns. It is hard work, especially on your own. You could opt for Amazon's platform, which might be the easier route. But, then again, at the end of the day, this is a serious business, which could produce significant profits. So you're either all in or you're not. 
You can make extra money left and right if you just know where to look. If you like to ‘tinker’ I’d suggest going to the DIY section on Pinterest. You can find thousands of projects there to make, and you can sell them at a nice profit. You can make 20, 30, or 50 bucks at a time, in real money. Not the ‘get rich online now!’ stuff you see around. I make old teapots into lamps, or old shirts into aprons and sell them locally on Kijiji or Craigslist. It’s totally doable. 
Become a freelancer in an area where you have expertise. If you have a skill that’s in demand, you can sell your services directly to clients who need them. Advertise your services on a personal website and look for freelancing jobs on sites like Upwork, Freelancer, and Fivrr. Additionally, hand out business cards and encourage happy clients to tell others about your work. Here are some ways you can earn money as a freelancer:[15]
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