Pro plus are pretty good, but you don't want to get used to taking them, I just use them for when I have a busy weekend that involves a couple of late night sessions.

If you live in the States, Jamba Juice's Matcha Green Tea Blast is a godsend. Doesn't give that jolt like coffee and you feel more energized throughout the day. For later in the afternoons a V-8 works wonders for a boost of energy that lasts.