Related Clues:

• Tuned-in
• Bright-eyed and bushy-tailed
• Not oblivious
• Attentive
• Like an insomniac
• Caffeinated?
• Mindful (of)
• Ready for the day
• No longer out
• Up on things
• Paying attention
• Knowledgeable
• With eyes open
• On top of things
• Up to date