Lock the bike to something solid.
Put the bike somewhere it is in view of a lot of people and lit if at night.
Try to put your bike next to other bikes that are worth more and don’t have as good locks
Using two different desings of locks is a good option, but you then need to transport both locks – see thesethese questionsquestions on locks
You may find you enjoy yourself better if you have a cheaper bike that you are not so concerned about being stolen.