1. Create a digital product: Consider creating an e-book, online course, or digital download that provides value to a specific niche audience. With platforms like Etsy, Gumroad, or Teachable, you can easily sell your digital products and earn passive income.

2. Print-on-demand merchandise: Use websites like Redbubble or Printful to design and sell custom t-shirts, mugs, or other merchandise without holding any inventory. You can earn passive income by creating unique designs and promoting your products through social media or online marketplaces.

3. Affiliate marketing: Join affiliate programs from companies like Amazon, ShareASale, or CJ Affiliate and promote products or services through your blog, website, or social media channels. Earn passive income by driving traffic and earning a commission for each sale or referral generated through your unique affiliate links.