I think volume has become somewhat overrated. A lot of people were fooled by the low-volume rallies we had earlier this year and missed some nice moves.
With that said, however, good volume can be powerful confirmation for your trades and a sign of when it might be a good idea to load up with greater share size. And for short-term trades, I'm always checking in Quotetracker and StockVision to find stocks that are trading more than their usual amount of volume. They seem to have a higher chance of making a nice clean move.