only by combining good living habits with healthy eating diets, can ... Ending nothing could be more important than your health. so ...
it's high time for you to ... sincerely hope my adivce will help/ be of use .... hopefully, you can take my advice into cosideration. you can find a balance between your life and health.
Sample writing
Boys and girls,
It is a great honour for me to give a speech themed How to Keep Fit. Now I'd like to share my advice with you. Here is advice.
Yours,
LiHua
Sample writing2
Dear Jim,
How is everything going recently? Learning that you are eager for advice on how to keep fit, I'm writng to offer you mine. Here is my advice.
In a word, I sincerely hope that my adivce can be of some help to you and that you can live a happy and healthy life.