Don’t use lazy passwords. Choosing password or 1234 is like putting a luggage lock on the front door of your house. Instead, come up with a longer password that contains both letters and numbers/characters, preferably one that references something significant only to you. For example, if the name of your beloved childhood goldfish was Sir Bubbles, swap out some of the letters for numbers and you can end up with a very nice password like s1rbubb735 that only you understand.
Never use the same password for different accounts. If you don’t want to come up with and keep track of dozens of different passwords, come up with a base password (ex. s1rbubb735) and tack a logical modifier onto it for each account (ex. on Amazon, use amzns1rbubb735; on Gmail, use gmails1rbubb735).