I needed to buy some yarn to make some belts for my friend's dd's. I put the skeins in my cart and went to check out. It said "You can add $6.95 (or something like that) without increasing your shipping charge." I didn't NEED anything else, but I went ahead and ordered 3 skeins of sock yarn to keep from wasting my shipping money.
OMG, I thought I was the only one that did that. Do you also buy enough to get free shipping (if they offer it) instead of just paying for it? I always end up paying waaaay more. Trust me, it's not and addiction, it's just frugal...right?