You may want to print this page for ease of reference.

Clicking the Lost Password link in the sidebar brings up this dialog:

Enter your username or your email address and click the blue Get New Password button. You will be sent an email, and the screen will change to a login form. Don’t fill in the form. Check your email.

At the bottom of the email is a link. Your email may look slightly different, but there will be some sort of link at the bottom:

Click the link. This will open a form where you can reset your password:

Try and make the password strong by including upper- and lower-case letters and symbols. One way of doing this is to take a phrase like “Use the Force, Luke!” and use the first letter of each word, along with any punctuation: UtF,L! (Because this phrase is suggested here, don’t use it. Pick one only you will know is yours.) You need to enter it twice to make sure you get it right. The bar will show “Mismatch” until the second one matches the first.

Click the blue Reset password button to reset the password to the one you have entered.

You’ll get confirmation:

Until you see this confirmation dialog, your password has not been changed. Click the Log in link.

You may find that your browser fills in a password for you in this dialog, but that will be your old one. Erase that and type your new password. If you are asked whether you want to remember it, you can usually say Yes if you are using your own computer. If you are using a public computer, do not allow the browser to remember the password, and do not tick the “Remember Me” checkbox.

That’s it! Click Log In and you log into the site.