Verified answer

if it is one of those with 3 or 4 dials that turn. I have opened them by pulling on the lock. With continued tension on lock slowly turn each dial until you feel it stick a liitle, it has found its hole.-leave it there and move to the next dial. just keep trying this you may get lucky. Start from one end ,. then the other

I used to have a barrel-type that, if you were patient, you were able to feel the alignment if you gently pulled on the cable as you slowly turned the tumblers.

If you know who made your lock and its not a cheapo-one, you could try contacting the manufacturer - they'll have the combo codes based on the serial number on your lock.

Finally, if its a padlock-type, you can try picking the lock with a piece of aluminum from a beer or soda can. Try typing in "padlock open aluminum" into the search on You Tube, and they might have a video on this rather interesting technique!