If you do any type of online financial transactions, whether you shop online, pay bills, or manage accounts, then you need good online passwords and you need to change them often. Here are some Do’s and Don’ts:

Don’t use passwords that are easy to guess like “welcome,” or “abc123.” And, don’t use passwords that are easy to research, like birthdays, phone numbers or addresses. It should be impossible for people to guess your password just by knowing you.

Do use a random combination of numbers and letters (both upper and lower case). Don’t use some personal association that’s easy to remember, because, no matter how clever you think you’re being, it will probably be easy to guess. You can learn to memorize a random number. After all, you know your phone number and social security number, and those are random.

Do change your passwords often. There are actually services out there that will steal your email password for a fee. They market themselves as private investigators, catching cheating spouses or business partners. If you use the same password for all your accounts, this puts you at great risk. Changing your password often won’t stop hackers, but it will make their work more difficult and expensive.