From Vanessa Gregory:
Both caffeine and sleep have restorative properties. So should you sip or nap? It depends on the situation.
Your head hurts: Drink Coffee
You want to run fast: Drink Coffee
You’re grumpy: Drink Coffee & Take a Nap
You need to ace a test: Take a Nap
You’re gambling: Take a Nap
You need creative insight: Take a Nap