How can I make my password stronger?

Here are a few tips on how to make your password stronger:

1. Use a unique password for each of your important accounts, like your Squareshot account and your PayPal account.
2. Use a combination of letters, numbers and symbols in your password.
3. Use more than eight characters in your password.
4. Do not use personal information or common words in your password.
5. Do not leave notes with your password on your computer, desk, any websites or online services.