On a given day, not everything in our lives goes how we would like. Appointments are cancelled; proposals rejected; rain when it was supposed to be sunny. Many of these things are out of our control, but one thing is not: how we respond to them. It often comes down to how we have prepared our minds to deal with the inevitable bends in the road.
As it turns out, there are some wonderfully effective ways to develop, and maintain, an positive mindset, and these are really easy. Make it happen.