Your first burn should last 2 to 3 hours. Let the wax melt all across the top surface. Anything less than that will create a tunnel effect where a hole forms in the center. A long first burn will also prevent hot wax from extinguishing your flame in the future. The scent of your candle will be stronger during the second lighting.
Hold that match! Before burning, cut your wick to about ¼ inch. This will avoid soot buildup. If you see your wick leaning, use tweezers to center it while the wax is still hot.
Keep your candle out of direct sunlight. Ideally, your room should be 60° to 80° so your candle is not too hot or too cold — but just right.
Each candle has a total burn time of about 25 hours before all of the wax is melted.