keeping healthy with the development of society,more and more people are concerned with their health.however,not all people know how to keep healthy,in my opinion,if you expect to keep fit,you are suppose to remember the followinng: first,keep balanced diet.you are what you eat,it's good to eat more fruit and vegetables and less meat.second,take exercise everyday.proper exercise and sports will make you strong and healthy,never find any excuses for yourself,after all,health is the first for everyone in the world. third,have a good sleep.if you don't sleep well,you will feel tired easily,and you can't concentrate on your work.last ,give up such bad habbits as smoking and drinking.