Besides the obvious necessities that would literally kill me if I didn't have them...
Toilet paper. I think about this a lot. I try not to waste stuff, but I go through a lot of toilet paper. So sometimes I try and think of ways I could use something else to reduce how much I go through. But reusing some form of material instead of toilet paper just seems too gross and over my limit. So yeah, I need my toilet paper.
Also, hot sauce, chocolate, and ice cream... but not mixed together. Well maybe the chocolate and ice cream mixed together, but not the hot sauce.