Don't go here for health and wellness advice. None of the post so far are from educated people in the field of supplements. It is a evidence-based fact that supplements are effective. Now which ones and what desired effect you personally seeking is the hard question.
I highly agree with fwagner. I have used them in the past, as a college athlete and can say that some work very well. That being said, there is a strong thought in the fitness industry that you should worry about calorie consumption, macronutrients, micronutrients and then supplements in that order. I'm not an expert but have spent a fair amount trying to educate my self. Long story short, if you arent to the point that you are regularely tracking your macros and adjustiing what you eat accordingly then I would start there.