It's common to forget your password, and much better to forget it occassionally then to use a simple password.
Note: If you find that your new password is being rejected, be sure to login with your username, not with your email address
Here are the steps to reset it.
1. Open your database in your browser and click the "Request new password" link
2. Enter either your username or email address
3. Click on the link in your email program
4. Click the login button
5. Enter a new password