First off, start looking at depression as a biochemical/hormonal imbalance in your body. Next, with this in mind, start looking for a cure. Will leaving the house more often help? Maybe, but not likely. What about antidepressants? Yes, that has a higher probability. For me, what got me off depression permanently after struggling for years was Testosterone Replacement Therapy.
This is probably obvious, but you might want to get your yearly checkup at your doctors (GP). They'll probably take a blood sample and check 'levels'. Might give you a clue on how to proceed.
There is certainly a correlation between the two. But I think our general sense of optimism towards life is set at a very early age. Take Elon Musk who, as a kid, was always described as an optimist despite his unsuccessful childhood.
I switched to Glide, a vendor-focused package manager, on 1.5. I think the community has already decided in favor of this approach. Post 1.5, Godeps' workflow just feels weird and unnecessary.
