I've been decluttering and tidying, inspired by the minimalist thread here. Over the weekend I have decided that I have too many:
Mugs
Tea lights (Do I need 50?) 
Bags for life/cloth shopping bags (I tend to pick them up as freebies at events, I seem to have enough for several lifetimes).
Espresso cups, I love them but could now open a cafe.
In 2013 I resolve not to buy any more of the above until I am down to my last one (or set) and I am not going to accept any more free bags when they are offered.
What are you overstocked with?