In beer "trouble shooting" always think "evaluation" before "action" in other words, evaluate the beer using proper tools (hydrometer, tastebuds, nose) before doing something to "fix" it (i.e. Re-Piching yeast, bottling, or dumping.)
You can't fix something unless you know it's broken...And you can't know something is wrong if you don't "listen" to your beer.
Most new brewers think something's wrong and do something in a "panic," before evaluating truly if something is indeed wrong.
More than likely your beer is fine and it finished early. Fermentations in normal beers don't get stuck unless there are a lot of fermentables present (then it wouldn't be a "normal" grav beer) or there is a major downward temp shift.
Don't ever repitch or even consider repitching before you take a hydrometer reading.
having said that, if it will make you feel better, then take a reading...I personally just pitch my yeast and come back to the beer in a month, checking it on occasion, especially in the first couple of days, to see if it look likes fermentation has started.
But I really don't do anything, I subscribe to the philosophy that the yeast has been doing this making beer thing since loooong before I was born, so they're the experts, and they rarely fail.
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Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman
I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew