Most of the energy drinks get me more hopped up than coffee.
A quick recommendation. If you're looking for a pick-me-up, but you're trying to shake the jitters, check out a tea called Yerba Mate. If you look at most energy drinks and concoctions of that sort, you'll actually see this listed among the ingredients. It's similar to caffeine, but does not have a lot of the same problems.
http://en.wikipedia.org/wiki/Yerba_mate
A little exerpt:
"From reports of personal experience with mate, its physiological effects are similar to (yet distinct from) more widespread caffeinated beverages like coffee, tea, or guarana drinks. Users report a mental state of wakefulness, focus and alertness reminiscent of most stimulants, but often remark on mate's unique lack of the negative effects typically created by other such compounds, such as anxiety, diarrhoea, "jitteriness", and heart palpitations.
Reasons for mate's unique physiological attributes are beginning to emerge in scientific research. Studies of mate, though very limited, have shown preliminary evidence that the mate xanthine cocktail is different from other plants containing caffeine most significantly in its effects on muscle tissue, as opposed to those on the central nervous system, which are similar to those of other natural stimulants. Mate has been shown to have a relaxing effect on smooth muscle tissue, and a stimulating effect on myocardial (heart) tissue."