Probably you should avoid the energy drinks as much as possible. They're just a lot of caffeine.

Voices are a burden I don't have, but don't let them win. I really think you should work on seeing what the voices are trying to tell you. I believe they're a product of your own mind. Maybe they're voices of people from your past?

Sounds good.

I honestly had a hard time thinking of activities that would help me cultivate positive emotions. If you've been just trudging through life, it's hard to know what makes you happy. Recently I started doing "flow" type activities. Those are activities that are challenging enough to absorb my attention, but not so challenging that I give up in frustration. I find them very calming. http://en.wikipedia.org/wiki/Flow_(psychology)

Physical exercise is also very good. A brisk walk for half and hour a day will tend to raise your mood so your thoughts will go more positive.

I've also been doing a lot of brain exercises recently. That improves my focus.

Another good idea is making a gratitude list. Every day write down five things you're grateful for in your life. Studies have shown that if you do that for several weeks, your mood will improve. It's good to make it a life-long habit. It just tends to focus you on the positive parts of your life.

Someone told me to think about what I enjoyed doing when I was ten and do more of that. I'm not sure I can remember, though. I liked to read. And swing on the swings at the park. Not sure I want to go play in the park at my age though.