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. 

Sure, there are some options like blogging that can make you a full time living but it takes a lot of hard work and dedication. But the majority of these methods, like surveys, reviewing, money making apps and so on, are not going to help you quite your day job. They are great for earning a little side cash in your free time. There is no need for me to hype things up and tell you otherwise.
How to earn money in India without investment? Still, it is a big question for many people. But you can start the blog any niche that you love but consider picking the ones that are popular in the market if you're intended to earn some money through blogging while you adhere to your passion. As it gets popular in the market, your blog will earn you money via advertising like Google Adwords, affiliate marketing & so on.
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.
So, I started reading and learning about affiliate marketing and blogging. I combined the two and after a 14-15 months of really hard work (sitting in front of computer for 14-6 hours a day and putting things I had learned, into action (building a blog, writing articles, promoting the site, etc), I started making enough money that I started believing in myself and the idea that I too could make a full time income online. From then on, I just kept on going and the income grew and grew. Now, I still work 8-10 a day on my online business, and sometimes even more. You have to constantly work and maintain it. Most people think because its online, its easy. That’s where they get it wrong.
A traditional way of earning money in your student life is selling your old notes. This is a one-time money making way yet this can be extended putting in some efforts. Students are always searching for someone who would write notes, make presentation, assignments, practical files and projects for them. This can be your mean to make money and somewhat gaining knowledge as well. Writing notes for students can be paid in accordance to one page basis. This was something a fellow mate in my college use to do and he made some decent money for the same. ClearSlide, Prezi, and Slideshark are some other platforms for making impressive presentations that will help you get paid. There is one flaw in the Indian education system, that is, students can always copy the projects of former batches which presents us with a new way to make money. Utilising the contacts, one can also come up with small shops like the ones which take orders for making presentations, working models and charts. This will also polish, the student’s skills and earn him/her a good pocket money.

The best part about being a YouTube Partner is that it’s free to join (although there are a few requirements but more on that later) and once you become a Partner and enable ads, you don’t have to do a single thing. Google Adsense will take care of everything for you. All you need to do is create quality videos and promote them so you can get more views.
If you are skilled at web development so could be your search for online jobs. If you don’t enjoy working on strict timings every day, you can choose to become a freelancer too. Many companies are providing virtual assistant jobs in different domains giving the employees the desired comfort of the home allowing you to fulfill your passion for working in the desired domain irrespective your household responsibilities. This will help you a lot to earn money online from home.
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.
Network Marketing is somehow relating to affiliate and digital marketing, a flexible way of earning money by getting more and more attention and people involved to the same. This is one type of a business, which requires a network to be formed betwixt various people involved in the same. There is a low upfront investment involved, for the purpose of registration or buying certain product sample. The criterion is to make your contacts and sell the product but some people actually compensate more participants to the network and hence get paid for it. Most of the revenue comes from recruiting new participants. But before joining any Referral Marketing Company do check its legal papers and working process because there are many people who are running fraud companies under the shed of Referral Marketing as suggested by Lokesh Tanwar founder of Business Alligators.
Students can not only sell their old stuff or unwanted things on eBay and other marketplaces online, but also sell items that they have created themselves. You can also buy things in bulk from another supplier or more at cheaper prices and resell them at higher prices. You can earn some extra money by selling your old stuff online. In addition to selling your own products, you can sell your used clothes, text books, unused gift cards, old CDs, DVDs, and much more items online via a number of marketplaces online such as:
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