You need to work hard to get to the point where you can earn $100 everyday...it will not be like turning on a switch suddenly. After some initial set up, and some hard work, you may get up to the $100 per day mark. Some potential ways:
1) Get a large following on a blog site or on social media such as youtube. Work with retailers and affiliates to promotes products.
2) Develop a series of tutorial videos about a subject matter that you have expertise in which also happens to be in high demand. Sell for $25-$50 per lesson download/access on sites like Udemy.
3) Start an online e-commerce shop on Shopify, Amazon, eBay, or via your own commerce site. Find relatively high margin products to sell, and use drop shipping to avoid inventory.