If you're simply trying to be more relaxed, have balanced and harmonious moods, I suggest regular exercise, a non refined, plant-based diet, no stimulants and enough sleep.
If you're looking for something with a bit more of a buzz, but without drugs side effects, you might be interested in
binaural beats (like
these)... I haven't personally tried any that replicate drug effects because I'm not interested in that, but I have used the sex ones and - woah!