If you would like to keep passwords secure and different for every site, a password manager is a must-have tool which can simplify managing passwords. KeePassX is an open source application which can help you manage credentials encrypted and secure. Some professionals say nothing is 100% safe. That might be true, but a password manager which is not connected to the cloud and allows you to create a key for extra security is a tool for your box. KeePassx will let you create a key for your password database which is required to open it. You do not have to create a key, but I recommend it.
KeePassX also has some neat features which allow you to save notes and attachments, and it’s compatible with both Mac and Windows. You can also save your database in the cloud. But I recommend keeping your key safe at home. If you do create a key, I recommend creating a backup which you can put away in a flash drive.