When things are “going wrong” or unexpected roadblocks occur, there is really nothing standing in your way of overcoming those difficulties except a change in perspective.
The only thing you should be concerned about is you. Don’t blame other people, don’t blame the traffic, don’t blame how expensive something is, don’t blame the mail man, don’t blame the rude cashier. Stop, assess the situation, and see what you can do to turn it around. The only thing you can control in any situation is yourself, so infuse the situation with your greatness and watch it bloom.