I occasionally use a MasterCard or American Express card on small purchases just to keep those accounts active. Also, I have been to the odd retailer that accepted only a certain type of credit card, so I find that having one from each major company is quite handy. Aside from my main Visa card which earns the airline points, the rest of my cards are of the “no annual fees” variety.

If you’ve got experience and expertise in a specific area of business, there are hundreds if not thousands of business owners who would love to jump on a phone call and pick your brain. This can be an easy way to make extra money online and to hone your skills to use in your consulting or freelance business. Sites like Clarity.fm let you create a profile where entrepreneurs and business owners can pre-pay to book a phone call with you for a set amount of time. Whether you’re an expert in raising money for startups, building apps, or running a restaurant, you can make extra money selling a few minutes of your time to people in need.
Need more ideas on how to make money online? Another strategy is using webinars to market your product, service, or course. I’ve done webinars to promote my financial planning practice and to drum up interest in my online course for financial advisors. With a webinar, you’re basically offering a lot of tips and advice for free — usually in a live format. At the end though, you pitch your paid product or service with the goal of securing a few deals.
Don’t put all your eggs in one basket. If you only promote one merchant’s products, you are stuck with their commissions, their landing pages, and ultimately, their conversion rates. It is important to work with many different merchants in your niche and promote a wide range of products. This affiliate marketing strategy will diversify the amount of commissions you make and create a steady stream of revenue when building an affiliate website. 
Most of my credit cards are of the “no annual fees” type, including one MasterCard on a separate account I keep at home as a spare in case I lose my wallet or incur any fraudulent charges. However, I do use a main Visa card which does have an annual fee because all purchases on that card reward me with airline frequent flyer points. For me, the annual fee is worth it since I do travel and I get enough points to redeem many free flights.

Making Sense Of Affiliate Marketing – An easy to follow online course that teaches you the ins and outs of affiliate marketing. It’s written by Michelle Schroder who makes $100K+ a month from her blog. A genuine super affiliate that shares her success stories and affiliate marketing techniques with her community both on her private Facebook group and on her blog. Sign up here.
The concept of affiliate marketing on the Internet was conceived of, put into practice and patented by William J. Tobin, the founder of PC Flowers & Gifts. Launched on the Prodigy Network in 1989, PC Flowers & Gifts remained on the service until 1996. By 1993, PC Flowers & Gifts generated sales in excess of $6 million per year on the Prodigy service. In 1998, PC Flowers and Gifts developed the business model of paying a commission on sales to the Prodigy Network.[8][9]
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