In-case you are wondering what passwords not to use… Here is the top 500 list of passwords that were leaked http://lifehacker.com/5-million-gmail-passwords-leaked-check-yours-now-1632983265

Please note that there was more than gmail that had passwords. Basically the story goes like this. Some hackers in Russia took a bunch of password lists from other hacks and joined them together into lists separated by email. The total number of passwords actually released was 11,873,069.

https://gec.im/passwords.csv

To check if your email was leaked, visit https://gec.im/passwords/

Source code at https://github.com/GRMrGecko/PasswordCheck