mj,
One way to think of support and resistance is to think of multiple floors in a multistory building. When you jump up and down you bounce off the floor (support) and you bump your head on the ceiling (resistance). If you break through the ceiling to the next floor, what used to be the ceiling (resistance) is now the floor (support).
When you are drawing your support and resistance lines, you usually want to use line charts. Some people prefer candles, but a line chart ignores daily highs and lows and shows you where a stock actually closed. For a valid support or resistance line you usually want at least 3 touches on the support / resistance line. The more touches you get on the line, the stronger the support or resistance is at that price.