Although there are a variety of Positive Thinking Courses, I like to see positive thinking as more a way of life. Not something to employ but a state to be in.
As darkness is the absence of light, evil is the absence of good, ignorance is the absence of knowledge, so negative is simply the absence of being positive.
My best moments and even long periods of time have been when I am maintaining the awareness that positive IS my natural nature and anything other than positive is unnatural and therefore will bring difficulty.
This may be a bit philosophical, but it’s 3.00am and I enjoy deep thinking in the morning
There’s a resource that I’ve got a lot from. You’re welcome to it free: http://improvefast.net/before-the-secret/