Candlestick patterns are one of the most used technics in trading. Here are some technices:
Doji
Hammer and Hanging Man
Bullish Engulfing
Bearish Engulfing
Morning Star
Evening Star
Doji Star
Three White Soldiers
Three Black Crows

In this Candlestick Patterns Bible ebook you will get to know about Candlestick Patterns in details.