Many people have trouble reseting their passwords, and to be honest, I just put myself through the process and it can get a bit confusing, so here is a how-to.
Step 1:
Click the Lost Password link.
Step 2:
You will be directed to this page where you can type in your username to begin the password recovery process.
Step 3:
After you submit your username and click Recover Password you will be shown a confirmation page.
Step 4:
Check your email that you registered on the forum with. You will be sent a link to confirm that you really want to reset your password. (This is to double check that someone else isn't trying to reset the password to gain unauthorized access to your account)
Step 5:
You will be directed to this page telling you an email has been sent with the new password.
Step 6:
Check your email that you used to register on the forum again, this time you will see a message with your new password!
Step 7:
You can now log in with your new password!
If you would like to change your password to something more easily remembered, follow the instructions in the How to Change Your Password thread.