Weather, winter, summer, elevation temperature humidity, scenes , objects, living non living , signboards ,colors, sounds , smell, tastes , sensation, day time ,night time, full moon , no moon ,days all effect the feeling inside you. Feeling inside you directly effects both mental and physical performance. When a person is used to a surrounding conditions any changes will effect the performance. Developed mind can maintain some balance despite the changes in out side. The good feel inside will result in good performance ,will give out more than what you have inside. Bad feel will result in bad performance worse than what you have in side ie sub level to your potential .
Music , good smell , good taste, good scene, regenerative meditation can enhance the good feel of a player.
Select what is best for you , get it ,recreate the states at your will some what similar to our own bodies that try to maintaining constant temperature without our effort. So the good feel will come to you as and when it is needed.