I've used stackoverflow count less time to find answers to my problems and just this last year I started to read through newly unanswered questions almost daily as part of my morning routine. I find it interesting and challenging. A lot of the times I don't know the answer off the top of my head so I go and do some research and solve it. Stackoverflow has become my daily programming challenged. Just from answering questions I've learned a lot and some of my answers have lead to bug fixes.
One way my answers have improved is when queries are involved; I may give you an answer that works but it would be vulnerable to sql injection . I have learned much from the comments that followed.