Lots of ventilation. Clean water. Avoid chemicals and pesticide (insecticides).maybe a multi vitamin and protein. Avoid sugar and processing. What sets a great warrior apart from a soldier is knowing when not to pull the trigger. Most people can be a good shot after practice. Most people are rats, when times get bad. It's easy to be good when all is good. It's when it gets bad, it shows what is really true. The more you buy, the more your bought. You have to mentally prepare. Wether it be sports, work, school, or crime. You increase the likelihood of suces by mentally preparing for different scenarios. Think of how you will react, how to solve the problem now , anticipate the dangers, formula a plan of how to deal with them , your response, and how you will be successful. It builds focus. Then once you are in the moment. You have to be like a Navy Seal: be focused, adapt to change, know when not to shoot , not to panic, keep focused. Find a solution. Think of the big pictu