All I can say is water changes, filtration, varied diet, and a tank, not cup or small bowl. My mother had a betta live 4 years before she gave it to my little brother who killed it in a few weeks. It lived a long and happy life in a 2.5 gallon aquarium with a small in tank filter, some gravel and small fake plant. I don't have the same "pasion" for bettas as my mother did, but basic aquarium principles that are put to practice will give you a happy and healthy long lived betta. Good luck.