What is the best tips to take care of my internal organs especially brain, heart, liver, kidneys, intestines, uterus, lungs?

Just follow all the standard healthy lifestyle advice you already know: eat a balanced diet that's low on red meat, exercise, keep height/weight proportionate, don't smoke, take alcohol and other mind-altering drugs in moderation (if at all), use seat belts and take other reasonable precautions against injury, and have safe sex.

Lead a healthy life. Eat nutritious food, exercise, avoid junk food , smoking , alcohol and drugs. Think good thoughts and do good deeds. I am sure you will be fie. Good luck