Change it as soon as you log on the first time. Randomly use both upper and lower case letters as well as punctuation symbols or numbers. Use different passwords for different accounts. If possible, use a password that is at least six characters long. More secure passwords have 13 characters or more.
Longer passwords enhance security.
Change your password frequently, at least every four to six months. If you need to use the same basic word as your password, vary it with unexpected numbers or symbols or misspellings. If you must share your password, change it as soon as possible. Sign out or log off or quit when you're done. The copyright laws prohibit any copying, redistributing, retransmitting, or repurposing of any copyright-protected material.