There is a very popular saying that goes to say that you are what you eat. That is entirely true, therefore it is important to limit the consumption of processed food and take in more organic foods.
Even artificial sweeteners can raise your blood sugar and insulin levels in much the same way as sugar. Although they may be lower in calories, they are not necessarily any more healthy. Instead change on how much you depend on sweet things. Start by cutting your sugars in half and work you way to not needing them at all.
To adopt a healthier lifestyle, try staying away from meat. Remember that you still need proteins in your diet and can still eat meat a few times a week. But you should also consider alternatives such as fish or eggs which are definitely much healthier for you, especially by reducing the risks of heart disease.