I guess it officially began at midnight. I haven't personally done any in store Christmas shopping so far this season. Not sure if I will need to.
Could do like we did when very young we would look through the good junk and "pass it on". Although I am sure that if I take a good look around here I could find a couple of new items to pass on. Re-gifting is frowned upon by some but according to CNN it is acceptable if you follow the "rules". http://money.cnn.com/2014/12/18/pf/regifting-rules/index.html
Mind your social circles.
Make sure some time has lapsed.
It has to be the right fit.
Don't re-gift with immediate family members.
The gift has to have value.
Keep the original packaging, but always re-wrap.
It can't be sentimental.
Fess up when caught.
Of course I have a few item new in package that seemed like good idea when I bought them. We will see.