The Five Elements:

WOOD:
The wood element is the beginning of new life. Wood is the originator of the five elemental cycle. To harness the Chi (Qi) of wood, you must use live wood. A plant is ideal since it emits live Chi and is also an excellent method of retaining Chi. Plants recycle the air we breath and can provide a natural filter for the air.

Wood feeds FIRE:

FIRE:
The Fire Element is the most "Yang" of the elements. It is the hot summer or a blast of heat. In Feng Shui, we usually use a candle or the color of red. Since Fire is so yang, you should be careful with fire.

FIRE feeds EARTH:

EARTH:
Earth is an interesting element despite the perception of earth being dirty;
Terracotta pots filled with potting soil make a great Earth remedy. Earth also represents the Mountain, although I think the pots are an easier option.

EARTH feeds METAL:

METAL:
Metal can be found in all forms. Copper, Silver, Gold, and Bronze are a few variations of the Metal Element. Using the Metal Element can take on all sorts of creative ideas from statutes to trinkets.

METAL feeds WATER:

WATER:
Our bodies are mostly made of water. In Feng Shui, Water is a very useful element. Water should be clear and flowing. Stagnant water can create more problems than it solves. A simple aquarium, or even a small "metal" fountain can be used.

WATER feeds WOOD:

The diagram above shows the order the elements take in the "Creative Cycle".
This is the harmonious arrangement of the Elements.

Yes this is Feng Shui so there is also a "Destructive Cycle" Take a look here