I'd like to echo the comments made above. This is just my personal view and I'm not claiming to be an expert on the topic, but I really believe that most alleged positive outcomes of energy pills seem to be accountable for by a simple placebo effect. The feeling of "energy" is such an intangible and subjective thing that I honestly think that the mere knowledge that you ought to be feeling more energetic from the pill you just popped can actually bring about that feeling in itself. Maybe for some people, that's reason enough to take a pill, but my personal view is that it's a pretty expensive illusion.
I really agree with nelie's comment about feeling more energetic through exercise. Although I have physically exerted myself when I return from the gym, I feel so much more stimulated, energetic and alert than I did before I went. Leading a sedentary lifestyle makes you feel listless and unenergetic, and I really feel that the only way to combat this, hard as it may be, is to just get up and move some more. It can be so hard to find the motivation, but once you've started to do it, I'm sure you'll soon feel the benefits.
I don't mean to cause any offence, but people that have the energy to work out aren't "lucky people". They aren't endowed with anything different to you or I. They just manage to motivate themselves to exercise more effectively and thus reap the energy rewards that follow. I really don't think there's any secret or luck to it at all.