Keep Your Wick Trimmed: Trim wick to 1/4" before lighting.
Melt Pool Importance: Be sure you allow the wax to melt to the edges of the jar each time you burn your candle. If you don't you may experience tunneling.
Safety First: Stop candle use when only 1/4" of wax remains. Keep away from children, pets, flammable objects and drafty areas. Do not leave candle unattended, seriously don't.