According to the Oxford Dictionary, mindset is, "The established set of attitudes held by someone." These acquired attitudes affect how you see the world, things and people (including yourself). There is a right and a wrong mindset to have if you are serious about moving forward with your life in 2020.
Until you have the right mindset for success, you will stay where you are. For some, this, it will mean staying in a comfortable place/state. However, there is no progress in the embryo of your comfort zone. As said time and time again, it is only a crazy person that will do the same thing day in, day out and expect a different outcome!