Should I use candles/incense when I’m meditating/praying/performing a ritual?

Yes. Candle magic is one of the oldest, and simplest forms of magical ritual. It cleanses, heals, and purifies. Fire gives life, and when you work with candle magic, you invoke the energy of the fire element, combining it with the energy of intention, as well as the element of air. This is an intention based practice and there is no 'right' or 'wrong' way to work with your tools. Work with them as you feel called or inspired to, and most of all have fun with your work.