In order to run your WordPress site like a pro, you are going to have to install certain plugins. There are plenty of awesome free plugins available for the platform. This infographic by WordPress Templates shows 30 popular WordPress plugins you should be familiar with:
How to check the strength of your passwords -- In general, any account that you have with a weak password could be at risk of being hacked. To eliminate concern, there are free password-strength-checking tools available online.