May I suggest: avoid first-thing caffeine; wait until your body has naturally woken up to drink caffiene (or other stimulants). The natural process for waking up (cortisol!) stops when you feel awake. Using caffeine can hasten that moment, but then it doesn't get you any more awake than you would have gotten naturally, and can disrupt your sleep cycle in various ways (for me personally, early caffeine actually makes it harder for me to fall asleep at night; I always thought I was really sensitive to caffeine, but it turns out "...even if I have it first thing in the morning" was more accurately "...only if...").