Related Clues:

• Regain one's strength
• Recharge one's batteries
• Prepare for a big day, in a way
• Prepare for a big day ahead
• Husband one's energy, say
• Recharge, in a way
• Renew one's strength
• Prepare for a long day ahead
• Advice before a big day
• Recuperate from weariness
• Take some time off, say