• Fluff your sleeping bag well before bedtime.
• Use a good ground insulator beneath your sleeping bag. Closed-cell foam works best.
• Put on fresh, dry clothes before crawling into your bag.
• Keep your sleeping bag dry. Dry your bag before stuffing it. If it's cloudy in the morning but sunny in the afternoon, spread your bag to dry at lunch or during a rest stop.
• Wear a hat or knit cap to bed.