Rules for safe passwords

1. A safe password consists of at least 8 characters, the longer the better
2. Do not use a combination with birthdays or pet names
3. Never use words which can be found plain in a dictionary
4. Avoid common repetition or keyboard patterns such as 1234abcd or asdfgh
5. Do not simply append or prepend a symbol to a single word
6. Use a combination of upper- and lowercase characters, symbols and numbers