IDEA #1:- Buy products in bulk and sell them online

Many businesses center on the simple concept of importing products in bulk and selling them individually for a profit.

How to buy in wholesale 

1)Buy via B2B sites - there are plenty of B2B sites where you can buy wholesale products.

A B2B website helps global buyers connect with global suppliers and vice versa.

Best B2B Marketplaces in India That Can Help You Grow Your Business, 

Best B2B Marketplaces in China 

2)Buy directly from manufacturers 

Once you find what kind of products you intend to sell, you can find manufacturers via simple google search. 

And crack exclusive deals.

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How to sell it online

1)eCommerce marketplaces: You can start selling on amazon, ebay, flipkart, paytm. 

Start a seller account and list your products. 

This articles can help you get started

List of Online Marketplaces in India You can Start Selling - Monster List

Best Online Marketplaces to Sell

2)eCommerce stores: You can start your own store either via Shopify or Ecwid, magento, woocommerce.

List your products and start selling.

Or 

sell both via marketplaces and stores.

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How to drive traffic to your online stores

1)SEO: Either you can learn on how to do SEO or you can hire an expert. My opinion is to hire an expert instead of learning and trying to do. 

The first step is very essential, keyword research. Once you have found the right keywords, probably you can hire some experts and start gaining traction via Google.

2)Instagram: Approach instagram influencers in your industry and market your products.

3)Snapchat: The same goes for snapchat. Find influencers who have plenty of followers and try to gain more followers.

4)Facebook: Facebook ads work well, or otherwise you can start via communities for free.

5)Communities: You got to find your community. Some of my favorites, reddit, googleplus groups, linkedin groups, facebook groups, delicious, scoopit.

6)Referral: One of the most under rated channel to gain more traction. Ask each customer to bring in at least one customers/ refer at least one friend.