Quick list of security – related links:
General list:
http://www.troyhunt.com/2015/09/troys-ultimate-list-of-security-links.html?m=1
Another one:
https://github.com/enaqx/awesome-pentest/blob/master/README.md
Open security training:
http://opensecuritytraining.info/
Certifications and trainings from Offensive Security (including free Metasploit training)
https://www.offensive-security.com/
Test your email account for known breach.
https://haveibeenpwned.com/