What's the best way to ensure Tailwind CSS is correctly installed in my project?

Use your preferred package manager (npm or yarn) to install Tailwind CSS and its dependencies: `npm install -D tailwindcss postcss autoprefixer` or `yarn add -D tailwindcss postcss autoprefixer`. Run `npx tailwindcss init -p` or `yarn tailwindcss init -p` to generate the `tailwind.config.js` and `postcss.config.js` files. Make sure you've configured your `content` array in `tailwind.config.js` to point to the files you want to style with Tailwind CSS.