John Bollinger's "Bollinger on Bollinger Bands" suggests using the bands with other indicators as the RSI.
I have also incorporated a crazy idea I had of combining Japanese Candlesticks with Bollinger Bands.
Bollinger indicates that when the price closes above the upper band a buy signal is generated, but I have found that if this closing above is produced by a white long candlestick the signal is much more reliable that if it produced by a black candlestick or a doji.
What to trade is a question I haven't solved yet, sometimes I think that ETFs like QQQQ, SPY, DIA, XLE, etc. can be good alternatives. I think that focusing in a small group can be better, but I don't know yet.