to trust your own feelings rather than obeying rules or allowing yourself to be influenced by other people's opinions

Take a chance and follow your nose - you may be right! 碰碰运气，凭自己的感觉做事——也许你是对的！

go in a straight line

Turn left, then just follow your nose and you'll see the shop on your left. 左转，然后一直往前走，你会看见商店就在左边。