Once you see brown needles usually that means the tree is already dead. I could be wrong and maybe someone may have some advice on saving it but I have never been able to bring one back. For your next tree I wouldn't water it every day, I think that is probably what killed this one. If you take a bamboo skewer and stick it in the dirt, when you think you need to water just check it. Pull it out of the dirt and see if it's moist. If it is you don't need to water, if it's pretty dry then you water.
To those who say "We can't afford to go green" I say "We can't afford not to".