Burn within sight and do not leave the candle unattended.
Do not burn near combustibles or things that catch fire easily.
Keep burning candles away from children.
To trim the wick you can use a wick trimmer to remove excess wick leaving between 1/8 inch and 1/4 inch of the wick to light. What we want to remove is any part of the wick that has mushroomed or built up excess carbon. We need between 1/8 and 1/4 inch of wick to form a good flame to burn the right amount of wax.
For the 60 Hour burn life candles; try to trim the wick so that it is straight across. If there is a peak in the middle or one side, the wax will travel mostly to the peak creating a smaller than ideal flame. When the wick is approximately the same distance away from the wax across the entire wick, it draws the wax more evenly up the wick for a better burning flame.
Scissors will work just fine and also, your fingers. The most important part of wick trimming is to remove the excess carbon from the tip of the wick. You can do this with a scissors or just break off any of the wick that has built up excess carbon and has begun to mushroom. It is helpful to turn the candle upside down before trimming or breaking off the mushroom top if you do not have a wick trimmer.
When using this method, be careful not to break off too much wick. You need at least 1/8 of an inch wick left to get a new flame started.
On your first use burn the candle until the wax has become liquid all the way to the edge of the container. You can burn the candle longer on first use, but be sure the melt pool reaches at least the container's edge.
After burning your candle, allow the wax to solidify before lighting the candle again. This also makes it easier to trim the wick!