I am firm believer in gambling being more than just a luck game, to be truly successful you have to master the whole mental game behind it.

Positive thinking is a no.1 priority in gambling.

Affecting your edge in a multidude of different ways, such as your confidence,
which in turn will affect your play and make you perform not as good.

I believe all guides will talk about this.
For more info, check out my gambling guide, to improve your Bitcoin betting - Bitcoin Gambling 101, you will find all forms of tips to improve your edge in Bitcoin betting. Improving your mental game being one of the ways to improve this.