If I wasn't able to watch a trade second by second (normally during bathroom breaks), I would set a stop limit order with some wiggle room between the activation price and the limit price. The wiggle room would depend on the stock I was trading. For example, if trading SUNW .05 wiggle room would be sufficient, wheras EBAY would require .10. Normally I get filled closer to the activation price than to the limit price.
I use IB and their BEST order route.