Having a big breakfast helps me stay awake and alert:

1 Glass milk
1 Glass water
1 serving instant oatmeal
1 toast with peanut butter
multivitamin, vitamin c, vitamin b

It seems like if I have a skimpy breakfast I can barely stay awake during my hour long commute. Some people also do better with some caffeine in the morning, but I've heard it starts becoming less and less effective.