The common-sense gun control measures we should take to reduce gun deaths are pretty obvious.
--Ban assault weapons
--Restrict magazines to no more than 6 rounds
--Close the gun show loophole
--Regulate the sale of body armor and explosives
--Background checks, with additional scrutiny on anyone with a history of mental illness and an examination of whether the individual has had any recent severely stressing life events, like losing a job or experiencing divorce.
That said, we must recognize that conservatives are to some extent right. Gun control measures will not stop the violence because A) the country is already awash in guns and large magazine clips capable of dispensing lots of rounds B) Such laws may reduce the number of guns that get in the hands of these kind of individuals, but that reduction is unlikely to be as significicant as we'd like it to be (in the most recent case, for instance, the shooter's guns were purchased by his mother not him. )
We need more creative solutions.