Most experts agree that caffeine is bad since it is a stimulant (and tea does have caffeine). It can cause the jitters and difficulty sleeping (I can attest to that).
Sugar is considered a simple carb and is a no no. All those drinks you listed have high levels of refined sugars, which makes your pancreas work very hard and they digest quickly, giving you a sugar high, then low.
Fast food and anything white (bread, pizza, spaghetti, potatoes) fall under the same category. Not to mention those simple carbs contain few vitamins and minerals. Processed carbs fall into this category, as well.
Complex carbs digest slower and contain vitamins and minerals your body needs. It's also believed that carb-rich meals and tryptophan (an amino acid) increase serotonin in your brain, which is a mood stabilizer (great for anxiety).
Also, you may want to research diabetes since the basics to a healthy diet are the same. Bigger meals may cause sugar lows since you go longer between feedings. It's recommended to eat smaller, carb-rich meals (with good fats and protein) more times throughout the day. That way, your body's energy level is more stable without the highs and lows that can trigger anxiety.
Oh, yeah. And alcohol is bad.