Theres also a factor of time on your hands and distance from the stores you live/work. But I see what you mean . All my stuff for my car and computer have been ordered on the net, its just so easy. I don't care when I get the parts as long as I do end up getting them its fine by me.
If you forget about it and one day sign for a package and remember what it is, you are usually suprised and even more excited then