While it would be cool, mastering your mindset will (unfortunately) not allow you to have Jedi-level mastery over yourself and environment. The mind isn't everything and the mind is deeply affected by context, culture, and environment. You can best customize something that you understand fully, inside and out. And how can you best fully understand your mindset? Create it!
Another exercise in customizing your mindset can be as simple as a two-step process:
1. Find the most supportive beliefs
2. Check if the beliefs align with (a potential) reality
The supportive beliefs you choose to adopt if they align with your mind, heart, body, and spirit (as outlined in the first exercise). In other words, make a positive change. Your newly adopted beliefs don’t need to reflect your current reality, but they do need to stretch your reality to make your dreams possible.