The infamous “QWERTY” 

Another over-used password choice is “qwerty”, rapidly followed by “qwertyuiop”. While it might seem completely random to a normal user, running your fingers along the top line of your keyboard is very predictable to a hacker.

We can’t emphasize this enough, long passwords are good, but the ones that also include random words and phrases are even better. Your letter combinations must not be found in the dictionary or phrases that are published in literature(because hackers can easily track them down if you’re publicly displaying your affection for a certain book or author). If they’re also grammatically incorrect, it’s even better.