Set up a professional invoicing system and send invoices either bi-monthly or monthly. Use your computer software’s invoicing templates or you can create an invoice using Excel. Decided when you plan to bill and be sure you send invoices on the same day of the month to ensure consistent payment. Institute a 10 day late policy, if possible, to make sure payment is received promptly.
Photo Editor/Web Editor. Photo and Web editors create or edit visuals that appear on websites and other digital media, such as white papers and corporate reports. This line of work is a great way to exercise your visual skills and become more familiar with layout and editing programs such as Quark, WordPress, and Photoshop. These gigs often require basic to intermediate coding skills, so they’re great for freelancers who want to expand their expertise beyond the written word.
Hunt for under-priced used books that you can sell online. Download an app that reads ISBN numbers so you can scan the barcodes on books. This will pull up the book’s current price on Amazon so you can see if it’s worth trying to resell it. Then, visit used book stores, thrift stores, and garage sales to look for high value books. Post the books for sale online using sites like Amazon or Ebay.[12]
If you’ve got a way with words and expertise in a niche, there are plenty of sites that will pay for articles and content you write. Think of the sites you read regularly. What can you contribute to them that would be interesting? Research your niche and then look for ways to pitch articles. Many sites will simply have a submission or contact link in the footer. To get started, check out my full guide to becoming a freelance writer on the side and then submit your articles to places like Listverse, A List Apart, International Living, FundsforWriters, and Textbroker.
Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with logistics like printing, warehousing and customer service. If you have some graphic design skills, then this is a great potential source for your web-based income. 
Double check yourself, before you double wreck yourself. Make sure everything you send to a company, whether a résumé, an email or a portfolio, is good to go. Double check your grammar and wording, and for God’s sake use spell check! This is especially important when it comes to the company’s name. Don’t spell their name wrong and be sure to type it how they type it (e.g. Problogger, not Pro Blogger).
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