To get the most out of your candles it is important to take good care of them. There are only a couple of things you need to worry about. The first is when you get your candles burn them for a couple of hours. The other is to esnsure you trim the wicks of your candles. Pinch the wick or use a proper wick trimmer just before you light your candle. This will help reduce any soot.
Candles are a fire risk and are dangerous especially around children. Don't Leave them unatended, don't move them when hot, you know they are hot, wax burns and it's very tough to get out of the carpet.