There are several ways to make money from a blog, including advertising, affiliate marketing, sponsored content, and selling products or services. Here are a few ways you could potentially make $100 on your blog, incorporating the example of tour packages:

Affiliate marketing: You could join an affiliate program for a travel company that offers tours packages, such as Viator or Intrepid Travel. Then, you could write a blog post promoting a specific tour package and include a unique affiliate link. If someone clicks on your link and books the tour package, you would earn a commission on the sale.

Sponsored content: You could reach out to a travel company that offers tour packages and offer to write a sponsored post promoting their tours on your blog. In exchange, they would pay you a fee for the post. Depending on the agreement, you could potentially earn $100 or more for a single sponsored post.

Selling products or services: If you have expertise in a particular area of travel, you could create a product or service related to that niche. For example, if you specialize in adventure travel, you could create an e-book or online course on how to plan a successful adventure trip. You could then promote and sell your product or service on your blog.

Remember, making money from a blog takes time and effort. It's important to focus on creating quality content that resonates with your audience and builds a loyal following. Once you have established yourself as a trusted authority in your niche, you can begin exploring ways to monetize your blog.