• Don’t go to bed with the same clothes you wore during the day. The perspiration will make you really cold at night
• Even though it’s warm during the day, don’t assume it’ll be warm at night. The temp differences can be quite drastic
• pack your clothes for the next day in your sleeping bag so they’re warm in the morning. I usually either roll them up and use them as a pillow, or put them deep inside my sleeping bag by my feet.