I think what you've suggested is good..pretty much, eat healthy, drink a lot of water, exercise, get enough sleep, minimize stress and make time to rest and relax :) Here are some corrections: 1) "I need advice about how having a healthy life?" --> "I need advice about how to have/live a healthy lifestyle." 2) "drink water, do exercise, run, healthy food ?" --> "drink water, exercise, run, eat healthy food?" 3) "What do you think about it?" This sentence is grammatically correct, but in this instance I would say, "What do you think?" Please let me know if you have any questions :)