One of the key things to remember when learning how to light a fire pit correctly is to place it on a level and stable surface. If using on a patio, put on another protective slab of stone or concrete at least 5cm thick, so your terrace won't be damaged by the heat. Always use the recommended fuel, such as wood. Don't throw in plastic which will melt and can cause fumes.
If you're including one of the latest fire pit ideas in your garden, position any fire pits and braziers away from the house or combustible materials. Keep children and pets away while it's lit or still hot, and don't leave it unattended or try to move it. Learn how to put out a fire pit safely, by allowing the fire to die down and peter out naturally. Don't pour on cold water as this could damage its structure.