The next item to avoid goes hand in hand with the first. As you grow older, soda in general might be a great substance to avoid. Diet and regular alike. Both have been linked to weight gain, heart disease, diabetes, and in some cases, stroke. Switching to diet soda isn’t much help because the artificial sweeteners in diet soda may be addictive and curb your appetite for healthy, naturally occurring sugars (refer to item 1). Try starting your day with a coffee with soy milk, fruit infused water, or tea with honey and lemon! These options are MUCH healthier (and we think, tastier!).