Practicing your faith, such as Wiccan rituals doesn't always fit into every day life.
For example, you may be in a place where you can't have your alter or candles. But that doesn't mean you can't still be spiritual.
It's important to remember that Wicca isn't about props. While a ritual may call for a candle or incense, spirituality and connecting with nature is a much deeper process.
There isn't anything that says rituals can't be done without candles and incense.
Step2
If you are practicing a ritual, then you are communing with spirits and nature. This is best done outside - if possible - and in a calm area. Meditation can help you come to this state.
Gems can be set out in your worship circle or star instead of candles. And, rituals can also be done without anything. What's important is that you know the circle is there. You created, blessed it and opened it.
Step3
Don't try to play make believe and pretend that you have incense or candles. Concentrate on the incantation and why you are doing the ritual. These actions are much more important than having other items.
Blessed Be!
Tips & Warnings
Never do anything that will harm yourself or another.