Your account id (email address) and your password are the first line of defense. Since your email address is easy to guess, ensure that your password is a good password. What does that mean? Here is Google's help about creating strong password.
If you know your password but want to change it, log in online using a web browser. See Change or Reset your Google account Password
For any account with an SIL entity (@sil.org, @jaars.org, etc), use SIL's password recovery tool
For @wycliffe.org accounts:
For any Global Alliance account (@wycliffe.net plus many other domains), use Google's trouble signing in page.
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