Common practices to reduce your system's vulnerabilities.

1.  Run regular vulnerability scans – it is recommended that you run a high level scan on your system at least once a month.
2.  Regularly patch and update your software – This well help you as these patches usually fix vulnerabilities that the software providers found.
3. Practice the principal of least privileges – This is done to minimize the harm an attacker can do so that they cannot can access to all the privileges within the system.
4. When setting up the system properly configure network settings.
5. Always keep your firewall on and have an update antivirus running as it provides a secondary firewall.
6. Use and enforce a strong and secure password policy – this will make attacking the system harder and more discouraging if it takes too long.
7. Always change the default passwords of network equipment
8. Make use of secure software development practices.