Here's how you can install additional themes, extensions, applets and desklets in Linux Mint 17. These additions will help customize your desktop and give it a unique look and feel that is tailored to your preferences.
1. Go to System Settings.
2. Click one of the following icons:
3. Click the Get More Online tab.
4. Click the checkbox of the addition you want to install.
5. Click the "Install or update selected" button.
According to Binary Tides:
20 things to do after installing Linux Mint 17 Qiana Cinnamon
Linux Mint 17 has been released and is named Qiana. Mint is one of the best linux distros that targets desktop users with focus on usability and simplicity. It comes in various flavors with different desktop environments like Mate and Cinnamon and different base distros like Ubuntu or Debian.More at Binary Tides
Additional Linux Mint resources