If you are speaking of outstanding tickets that are not yet due it would be difficult to find out about these tickets since they would not yet be on your driving record. Normally one may lose a ticket or forget to pay it but normally one is not unaware that they have a ticket they must deal with unless your driver's license or registration address is incorrect and a ticket was sent to you.
If you have forgotten about a ticket or was unaware of one that needed to be taken care of and it is past the due date or court date then a Failure to Appear (FTA) or Failure to Pay (FTP) and conviction of the offense may be listed on your driving record. So you would need to contact your state's Department of Motor Vehicles (DMV) to get a copy of your driving record. Once you find out what court filed this information with the DMV you could then contact them to take care of the ticket.
Or if you are asking about moving violations you have previously received and taken care of but that you have forgotten about then you should be able to find out about them by requesting a copy of your driving record from your state's DMV. By reviewing your driving record you will be able to find out what violations you have on your MVR. Also if points have been assigned for the moving violations they also will be listed on your driving record that you can order from the DMV.