There are several ways to make your candle wax burn longer. Firstly, make sure to trim the wick to approximately ¼ inch before lighting the candle. Excessively long wicks can cause the flame to burn too quickly, resulting in your candle burning out faster. Secondly, avoid burning your candle in drafts or breezy areas, as this can cause the flame to flicker and the wax to melt unevenly. Thirdly, allow the wax to melt completely across the surface of the candle each time you burn it. This will prevent tunneling and ensure that your candle burns evenly for longer. Finally, consider using a candle snuffer instead of blowing out the flame, as this can prevent hot wax from splattering and ensure that the wick remains intact for your next use.