Mine would be buying figures and sometimes with food.
I really want this
Chun-Li figure. But she's 55USD. I already set aside 70USD for her but the guilt is that the money that i set aside can be used for important expenses such as paying the gasoline for my car, pay bills, food ,and school expenses. I still getting her though, she will be a nice addition to my family of figures. I'll go dug in the sofa for loose change afterwards.
As for food. My mother always tells me you never lose with food but some times i feel that way. For example i go and eat fast food such as McDonalds. I'm really hungry so i go there to pay for my meal and start eating but after i'm finished my stomach will start to hurt and i think to myself "Oh i shouldn't have bought that food". My body always deny'd fatty foods.