One of the most commonly explained and followed way, but usually never make properly comprehensive to the reader. When we talk about blogging, it’s acquiring a domain and writing on a specific niche. If you can pen down your thoughts in a specific genre, this is your thing and advertisements like Google AdSense can be a good way of earning money through blogging whilst if you are just a new registration with nil followers and viewers, this will bring no help. In India, most of the people make a mistake by considering writing articles, after going through different website contents regarding that topic as blogging. It indeed takes hard work and is also time-consuming for anyone to take reference from far-famed websites, giving a new explanation to the points they explained, and after all this, awaiting AdSense approval. This usually doesn’t work well and declined by Google, which makes the writer quit sooner than one can think. To have your content be treated as a quality source of information by Google, one needs to maintain ingenuity. There are many things in India which are not discussed by other bloggers, one can write over those issues using a personalized point of view and research in college. Talking about current issues, genuine problems of student life, a specialized research topic, and what not can be written about. When I speak about blogging, which I have myself done; I talk about people who have something unique and veritable to write about. There is a way of expressing, wielding a phrase, and making choice of the topic which will interest the reader. It requires patience to generate followers and viewers.
Amazon is more than an e-commerce, Here you can earn money also to support your studies. First of sign up to Amazon mturk India. Getting an approval of Amazon mturk not an easy task. You have to try at list twice or thise, as soon as you able to work in Amazon mturk you can get micro work and earn up to $50 doller each day. You can invite your college group by share same work to them.
Blogging is not a writing job; you should take care to keep the content informative and engaging. You as a blogger should not only aim at grabbing the attention of the reader but also get noticed by the search engine to increase rankings. The niche you are focusing on the blog should be targeted with search engine optimized keywords to get higher rankings. And in this way you can earn money money from your home without investing anything. 
The second method of online sales doesn’t require you to have own products and services; you can partner with existing ecommerce sites like Flipkart, Amazon. The second option seems to be more comfortable when compared to the earlier option because you will already have existing customers in the digital market place and you have to do is list your product to conduct some sales.
Each course is taught by an expert instructor who has created the course. Udemy hosts the courses created by thousands of instructors from the world over. The website does not charge anything for hosting the course. This means that you can host as many courses as you want on Udemy without having to pay a single cent. The price of your course can range from $10 to $50.
And yes, if you do commit to something like blogging, or writing and freelancing, you can and will make a living (you could even make way more than you could ever at your day job. That said, no matter how much time and effort you put into things like surveys, paid to click sites and things like that, they are not gonna replace your day job. They are just an attitudinal income generation options that you can use in your free time.
I think you should also include yesmobo.com in the above list. Any one can make money by sharing YesMobo Ads on Whatsapp, Facebook, Twitter etc. All you need to do is install YesMobo App from google playstore and start sharing ads. If any one will click on the link given in the ad you share you will earn money. So simple right ? Give it a try. And they pay via paytm or bank transfer.
I have been doing this research on how to earn online from kind of two years. I have gone through many blogs and articles but yours has touched me a bit strongly (hope you don’t sense any buttering). The way you put the ideas, framing and presenting the words in an order is quite effective. Thanks for both enlightening and bringing confidence through it.

If you have good photography skills, your smartphone could turn into a good source of income here too. Click for images of nature, food animals and anything that is eye feast with the smartphone and list on the sites like shutterstock, istock photo, photobucket. When the visitor wants to purchase the photo, you will get the money that you have fixed for a picture.
Talking about another example here, a senior of mine in some other college had some financial trouble at home. Paying the college fee was somehow, becoming arduous hence, he thought of a way to teach youngsters piano, which he had learned 5 years before. In his after college hours, he gave lessons which earned him 700 per students. Within a month 20 students enrolled in his classes.
2. InboxDollars – InboxDollars is similar to Swagbucks, since you’re going to be taking surveys, shopping, etc., so if you want to maximize your return, sign up with both websites. They also offer a search engine that pays you (like Swagbucks) and you get $5 just for signing up.  I won’t continue to list survey sites one after another down the list, but if you want to get paid to take surveys, also check out GlobalTestMarket, E-Poll Surveys and Survey Club.
One of the best ways for students to earn some extra cash is by doing small tasks or offering small services to businesses and people on a microgig site. There are many reputable microjob sites you can join to advertise your skills and services by posting any job that you can do or service you can sell for a fixed amount of money for each job done or service provided. You can use microgig sites to offer different types of freelance services or to do different types of jobs via your computer. You can post microgigs to offer various services such as
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