Use `pip`, the package installer for Python. Install packages with `pip install package_name` and ensure you have the correct version of Python installed.

Installing third-party packages in Python is primarily done using pip, the package installer that comes with Python distributions. To install a package, open your terminal or command prompt and run:

pip install package_name

For example, to install the popular requests library for making HTTP requests, you would use:

pip install requests

You can specify a version using:

pip install package_name==version

To list installed packages, use:

pip list

If you want to uninstall a package, run:

pip uninstall package_name

It's also a good practice to use virtual environments when working with third-party packages, as they keep dependencies isolated for each project. Additionally, you can find packages on the Python Package Index (PyPI) website, which hosts a vast collection of third-party libraries. By mastering package installation, you can easily leverage the Python ecosystem to enhance your applications.