Place your hand near ashes to be sure they are cold. Be careful of fires near tents. Use a trail stove for cooking. Suitable firewood is often in short supply around a campsite or lean-to. Do not cook or prepare food in lean-tos.
Spilled food attracts animals that come later.
It is very dangerous to use a stove in a tent and to cook in such close quarters. Take out what you brought in. Clean up the trail and campsite leaving it better than you found it. Take only pictures and leave only footprints. If you bring a pet, keep it under control and bury its waste to protect water supplies.