Tech Insider has published an awesome video which shows how easy it is for hackers to break passwords.
They explain how hackers are capable of obtaining password software which allows them to generate millions of password combinations.
Although the video claims that single phrase passwords are not enough, it is still better than 12345. The video explains that by using passphrases you will be making it harder for cybercriminals to break your password with password cracking software.
If you find it difficult to create a passphrase, then simply grab the first 4 things you see in front of you and create a password out of that by using spaces with each new word.