1. Stop condensation. Create a low vent to let cool air in (the bottom of a door) and a high one (a ceiling vent or the top edge of an opposing door) to let warm air out.
2. Learn the tautline hitch. It’s the best knot for guying a tent as tight as a drum. backpacker.com/tautline.
3. Store it right. It’s fine to pack a wet tent on the trail, but dry it thoroughly before storing to prevent mold and mildew buildup.