I enjoyed reading this blog post about how to have a healthy lifestyle: http://www.healthylifestylesblog.co.uk/healthy-lifestyles/how-to-live-a-healthy-lifestyle/
The author emphasises the importance of eating well and exercising regularly as well as relaxing and taking time out for yourself.
Even though you probably know all of this you may not be doing it because you believe it isn’t possible given the circumstances of your life. It might be the strength of your in-built beliefs which are stopping you from making the changes you would love to make. So listen to the excuses you make and ask youreself if those statements are really true. You may be surprised to find that in fact they are not always true and if you begin to consider life with those beliefs turned around that you would be able then to make the progress you want and do things differently.