My friend Ana

My friend Ana is sick. She wents to the doctor two days ago and she had high blood pressure. I think she needs some advice and to change her lifestyle.
I gave her these tips:
Ana, you should take care yourself. You had better should (1) eat healthy food, stop smoking, working out and not work too hours.
You don't need lost to lose weight because you are thin, but if you ate a healthy diet, not junk food and ate quiet enough you would feel better.
The Your exercise routines is also very important. If you work out at least three times a week you would feel better.
If I were you I would work a reasonable working hours and wouldn't work overtime.

(1) "Had better" is not wrong, but sounds more like a threat. If you're giving advise, you would generally use "should". (Example, "You had better pass your English test or you will fail the entire course!") 

My friend Ana

My friend Ana is sick. She wents to the doctor two days ago and she had high blood pressure. I think she needs some advice and about how to change her lifestyle.
I gave her these tips:
Ana, you should take care yourself, you had better eat healthy food, stop smoking, start working out and not work too many hours.
You don't need to lose weight because you are thin. But if you ate healthy diet, not junk food and ate quiet just enough, you would feel better.
The exercise routines is also very important. If you work out at least three times a week, you would feel better.
If I were you, I would work a reasonable working hours and wouldn't work overtime.

Excellent effort! Thanks for asking for help. xolani skype: xkacela

My friend Ana

My friend Ana is sick. She went to the doctor two days ago and she had high blood pressure. I think she needs some advice and to change her lifestyle.
I gave her these tips:
Ana, you should take care of yourself, you had better eat healthy food, stop smoking, working out and not work too much hours.
You don't need to lose weight because you are thin but if you ate healthy diet, not junk food and ate quiet enough you would feel better.
The exercise routines are also very important if you work out at least three times a week you would feel better.
If I were you I would work a reasonable working hours and wouldn't work overtime.