Password
Your password will never change unless you do it on purpose.
Personally, I change my GMail password whenever I'm forced to change my Network password. That's the one that we automatically have to change every few months and is the one used to login into the computer. I like to have them both be the same. It's also a good idea to change the GMail password peridically.
If you use GMail on your phone, you'll have to enter the new password there, too.
To change it:
Begin by clicking in the upper right corner.
If you've uploaded a photo, you'll see yourself. You can upload any graphic; it doesn't have to be your picture.
Click on the word Account.
Click the word "Password."
Type your current password in the upper box.
Type the one you wish to have TWO TIMES. This ensures that the one they think you want is really what you intended it to be.
Click the Change Password button and you've done it!