i respectfully disagree w/ the hydrometer for 2 reasons.
i've never had good results (maybe i'm just an idiot)
and once you drop that thing in a carboy, you can't get it out, and if you decide to de-gas with a power drill and stirring rod, you're likely to destroy it, leaving all kinds of fragments in your nice expensive kit
plus, if you're doing it in your primary (assuming it's an opaque bucket) you'll have to pop the lid everytime and run the risk of contamination.
look, if you're running 72+ degrees, and you let it sit about 10 days in your primary (assuming you had a good liftoff) and then you transfer to a secondary carboy (take some of the sediment with you) and let that sit for however long you want (at least a couple of weeks), it's VERY hard to imagine you have much fermentation activity going on at that point.
just my $0.02