1) Fiverr

Offering services at Fiverr can help you bring in over $2,500 a month. If you want to get your gigs selling quickly offer services in the graphic design/social media category (think designing Facebook covers, YouTube covers, SoundCloud album covers, YouTube thumbnail art, etc). You can also offer video testimonials as well since those sell like hot cakes. 

2) Let Go

Selling unwanted items such as old phones, shoes, and TVs on Let Go is a great way to earn extra money online while declutering your home.

Make sure you bring someone with you when meeting face-to-face, only accept cash, and meet at a public place such as McDonald's, Starbucks, A mall, etc...

3) Mercari 

If you'd like to make a couple hundred dollars from home without meeting anyone face-to-face I recommend using Mercari. 

Most of the things sold are clothes or electronics at low prices (which add up very quickly when selling multiple items).

4) Zazzle (and Social Media - 13 and up)

You can make passive income selling your artwork, sketches, photographs, and designs on Zazzle. Based on my experience I recommend selling wedding invites, party invites, greeting cards, stickers, throw pillows, and mugs. 

It's better to make $500 from selling 200 invites, and stickers than making $10 from a t-shirt that won't sell for another 3 months. 

Promote your items on social media (twitter, and facebook have the most click through rates). 

The shirts at zazzle are overpriced ($20 for a plain white t-shirt) so it's best to sell cheaper items in bulk. 

A quick tutorial about creating great hubs on hubpages from HDVideoTuts

5) Hubpages (18 and up)

If you have a knack for high quality writing, and would like to earn money for writing engaging content online then hubpages is the right platform for you. With hubpages you earn money through several methods such as Google Adsense, the hubpages ad program, and the amazon ad program. Hubpages is one of the best platforms available to make money writing from home without spending a dime. All you need to give is a little bit of time. 

I recommend writing about topics you are very knowledgeable in such as (car trouble, fashion, beauty, programming, etc). 

You get paid once you reach the minimum of $50. 

There are quite a few hubpages writers who make an extra $400+ a month from home using hubpages. 

Quick tutorial by Twist3dDisast3r on creating items on redbubble

6) Redbubble

A great alternative to selling your designs on Zazzle is Redbubble. Unlike zazzle Redbubble allows you to cash out your hard earned dollars every month without any minimums. Many people have found success selling t-shirts, posters, and mugs at Redbubble. 

Redbubble prints, and ships your items for you so you do not have to send or package anything yourself. Just sit home, and watch the money poor in through your email notifications. 

Tips On Being Successful on Etsy by Kelsey Brooke

7) Etsy

At etsy right now it's all about planner stickers so if you want to make a leap in your income this year get yourself silhouette (a completely free online software. You can also buy the silhouette printer if you want but you'll be spending a pretty penny. Always test before you invest), and make some digital printable stickers. You can make more money by selling physical stickers that you will ship, but you have to make sure your print quality is top notch. 

Many etsy sticker shops recently started are booming with thousands of reviews, and make a couple hundred to a few thousand extra dollars a month. 

Keep in mind that Etsy does charge a $0.20 listing fee per item every six months so if you have 20 sticker listings it'll cost you about $4 total. 

8) Youtube

If you have a boyfriend or girlfriend, love to do pranks on each other, and need some extra money...youtube might just be it for you. 

You can make some serious cash online with Youtube "Pranks" (majority of the pranks are planned ahead of time for entertainment purposes, and to preserve relationships. Basically if you don't want extreme backlash from your friends, family, or partner you could fake your pranks like some popular youtubers do. Just make sure you double check your footage and don't get caught faking your pranks). 

All you need is an HD camera, editing software, an enticing title, and clickbait thumbnail. 

You are not limited to pranks (that is just one of the fastest ways to blow up on YouTube--a couples channel). 

You can do Vlogs (unless your life is extremely exciting don't put all your eggs in this basket), fashion and beauty (makeup gets many views), DIY tutorials (these do amazing as well. You can do tutorials on helpful things you found out that you don't usually see in youtube), and more. 

You can make over $10,000 per month working from home doing YouTube videos. The content you put out to get views is up to you. 

An honest famebit review by ajourneyeast (some of the info such as follower count needed is outdated as it's a year old, but the tips are still helpful)

9) Famebit 

If you have at least 5,000 followers on YouTube, twitter, tumblr, or facebook you can make quite a bit of cash from home with famebit. It's all sponsored posts. You collaborate with a company that you like, and talk a bit about their product or service. I recommend that you work with brands you like or are genuinely interested in. 

10) Grapevine Logic

A great alternative to Famebit, and Grapevine allows Instagram accounts as well (Famebit does not). You must have at least 5,000 followers on your Instagram account for Grapevine as well.

Each task has certain requirements, and pay different rates. You can request the amount you'd like to do the prices for but just make sure it's reasonable or else you'll get rejected.